Fans make their way into Candlestick Park before an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Fans look out from Candlestick Park before an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Fans make their way into Candlestick Park before an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Fans make their way into Candlestick Park before an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Fans tailgate at Candlestick Park before an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers fans tailgate before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers fans gather outside Candlestick Park before an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

A San Francisco 49ers fan holds a ball in the parking lot before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

A San Francisco 49ers fan cheers outside of Candlestick Park before an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Flags fly outside Candlestick Park before the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

A San Francisco 49ers fan before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

A San Francisco 49ers fan before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

A San Francisco 49ers fan before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

A San Francisco 49ers fan cheers before the start of their home-opener NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

A Detroit Lions fan cheers before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers head coach Jim Harbaugh on the field before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Sportscaster Bob Costas before the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions quarterback Matthew Stafford before the start of an NFL football game San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions quarterback Matthew Stafford before the start of an NFL football game San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions wide receiver Calvin Johnson before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions head coach Jim Schwartz on the sidelines before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions quarterback Matthew Stafford warms up before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers wide receiver Michael Crabtree warms up before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Vernon Davis, left, and tight end Delanie Walker, right, before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions quarterbacks Shaun Hill, left, and Matthew Stafford, right, run onto the field before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions wide receiver Calvin Johnson warms up before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

A Detroit Lions helmet on the field before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions wide receiver Calvin Johnson warms up before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers wide receiver Randy Moss on the sidelines before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions running back Kevin Smith warms up before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions tackle Jeff Backus warms up before the start of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers wide receiver Mario Manningham runs with the ball past Detroit Lions strong safety Erik Coleman (24) during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

The San Francisco 49ers come onto the field at the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

The San Francisco 49ers rush onto the field for the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers free safety Dashon Goldson comes onto the field at the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Fans in Candlestick Park cheer the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers inside linebacker Patrick Willis comes onto the field at the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers defensive back Chris Culliver, right, breaks up a pass intend for Detroit Lions wide receiver Titus Young, left, during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. A pass interference penalty was called on the play. (AP Photo/Marcio Jose Sanchez)

Detroit Lions wide receiver Stefan Logan, left, carries the ball past San Francisco 49ers free safety Trenton Robinson, right, during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Fans in Candlestick Park cheer before an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers running back Frank Gore, right, runs with the ball but is stopped by Detroit Lions outside linebacker Justin Durant, left, during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers cheerleader during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers cheerleader during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers head coach Jim Harbaugh and his team prepare to come onto the field at the start of their NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers wide receiver Randy Moss reaches for a pass, but Detroit Lions cornerback Jacob Lacey is called for interference on the play, during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Vernon Davis runs with the ball for a touchdown past Detroit Lions free safety John Wendling, right, during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. Davis scored on a 21-yard pass from quarterback Alex Smith. (AP Photo/Tony Avelar)

San Francisco 49ers tight end Vernon Davis, right, celebrates after scoring a touchdown on a pass reception during the first quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. At left is wide receiver Michael Crabtree. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Frank Gore carries the ball into the end zone for a touchdown during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. At right is 49ers defensive tackle Will Tukuafu (92). (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers cheerleaders during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions wide receiver Nate Burleson is stopped by the San Francisco 49ers defense during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

The San Francisco 49ers defense during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions quarterback Matthew Stafford, right, hands off the ball to running back Kevin Smith during the second quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers running back Frank Gore carries the ball during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers defensive back Chris Culliver, left, breaks up a pass intended for Detroit Lions wide receiver Titus Young, right, during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. An interference penalty was called on the play. (AP Photo/Tony Avelar)

Detroit Lions wide receiver Calvin Johnson is stopped by San Francisco 49ers strong safety Donte Whitner, bottom, as defensive back Chris Culliver, top, moves in during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers wide receiver Mario Manningham carries the ball past Detroit Lions strong safety Erik Coleman, right, during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions quarterback Matthew Stafford reaches back to pass during the first quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers head coach Jim Harbaugh yells during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith throws during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions head coach Jim Schwartz applauds on the sidelines during the second quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. At right is Detroit Lions outside linebacker Justin Durant. (AP Photo/Tony Avelar)

San Francisco 49ers tight end Vernon Davis, left, and Detroit Lions defensive back Drayton Florence battle for the ball during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Kendall Hunter, right, runs with the ball, but is stopped by Detroit Lions free safety John Wendling, left, during the third quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith, left, runs with the ball past Detroit Lions strong safety Erik Coleman, center, and defensive end Cliff Avril, right, during the third quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions running back Kevin Smith, top, is upended by San Francisco 49ers free safety Dashon Goldson, bottom, during the third quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers running back Frank Gore celebrates after scoring a touchdown during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions quarterback Matthew Stafford throws during the second quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith drops back to throw during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions defensive tackle Corey Williams, left, and defensive end Ronnell Lewis, right, rest on the bench during the third quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions wide receiver Calvin Johnson is brought down with the ball during the second quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions kicker Jason Hanson kicks a field goal during the second quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions quarterback Matthew Stafford, right, is brought down by San Francisco 49ers outside linebacker Ahmad Brooks, left, during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions kicker Jason Hanson during the third quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions quarterback Matthew Stafford, right, is brought down by San Francisco 49ers outside linebacker Ahmad Brooks, left, during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers tight end Vernon Davis, right, runs to score a touchdown as Detroit Lions cornerback Jacob Lacey, left, watches during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. Davis scored on a 23-yard pass from quarterback Alex Smith. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith drops back to throw during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers fans cheer at halftime during an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions head coach Jim Schwartz, left, shakes hands with San Francisco 49ers head coach Jim Harbaugh at the end of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Marcio Jose Sanchez)

Detroit Lions head coach Jim Schwartz, left, shakes hands with San Francisco 49ers head coach Jim Harbaugh at the end of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith has a cut on his nose at the end of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith during the third quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith celebrates at the end of a win over the Detroit Lions during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Tony Avelar)

San Francisco 49ers tight end Vernon Davis runs into the end zone to score a touchdown as Detroit Lions outside linebacker Justin Durant (52), strong safety Erik Coleman (24) look on during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won the game 27-19. Davis scored on a 23-yard pass from quarterback Alex Smith. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions head coach Jim Schwartz, left, shakes hands with San Francisco 49ers head coach Jim Harbaugh at the end of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith, left, hands off the ball to running back Frank Gore, right, during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions tight end Brandon Pettigrew, right, makes a 9-yard touchdown reception next to San Francisco 49ers strong safety Donte Whitner (31) during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Tony Avelar)

Detroit Lions quarterback Matthew Stafford (9) is sacked by San Francisco 49ers outside linebacker Aldon Smith (99) during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Tony Avelar)

Detroit Lions head coach Jim Schwartz, right, stands on the sidelines near head linesman Julian Mapp, left, during the fourth quarter of an NFL football gameagainst the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers head coach Jim Harbaugh, left, and quarterback Alex Smith, right, during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers tight end Vernon Davis, left, after scoring a touchdown during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. At right is Detroit Lions linebacker Ashlee Palmer. (AP Photo/Tony Avelar)

San Francisco 49ers tight end Vernon Davis, left, is greeted in the end zone after scoring a touchdown during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions quarterback Matthew Stafford (9) in action against the San Francisco 49ers during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Tony Avelar)

Detroit Lions head coach Jim Schwartz paces the sideline as his team plays the San Francisco 49ers during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions head coach Jim Schwartz paces the sideline as his team plays the San Francisco 49ers during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions head coach Jim Schwartz paces the sideline as his team plays the San Francisco 49ers during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions wide receiver Calvin Johnson (81) in action against the San Francisco 49ers during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers head coach Jim Harbaugh, left, and quarterback Alex Smith, right, during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers head coach Jim Harbaugh watches his team play the Detroit Lions during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers head coach Jim Harbaugh watches his team play the Detroit Lions during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

El cornerback de los 49ers de San Francisco Chris Culliver, derecha, rompe un pase dirigido al wide receiver de los Lions de Detroit Titus Young en el primer período de un partido de la NFL el domingo, 16 de septiembre del 2012. (Foto AP/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith greets fans after a win over the Detroit Lions during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Tony Avelar)

San Francisco 49ers running back Kendall Hunter, right, runs with the ball, but is stopped by Detroit Lions free safety John Wendling, left, during the third quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Vernon Davis celebrates in the end zone after scoring a touchdown on a 23-yard pass from quarterback Alex Smith during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

FILE - This Sept. 16, 2012 file photo shows San Francisco 49ers tight end Vernon Davis, left, reacting after scoring a touchdown during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco. At right is Detroit Lions linebacker Ashlee Palmer. Davis might get fewer style points these days for his touchdown celebrations _ and he's perfectly fine with that. (AP Photo/Tony Avelar, File)

Detroit Lions wide receiver Stefan Logan (11) during the third quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions running back Joique Bell carries the ball during the third quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers wide receiver Kyle Williams (10) reacts during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions defensive tackle Nick Fairley Is seen sitting on the bunch during the third quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith, right, and Detroit Lions defensive end Kyle Vanden Bosch, left, are seen in action during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers mascot Sourdough Sam performs during halftime of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith shouts a call during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions head coach Jim Schwartz reacts on the sideline during the second quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith in action during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith in action during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith in action during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions quarterback Matthew Stafford, left, hands off the ball to running back Joique Bell during the third quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers running back Kendall Hunter runs with the ball during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions running back Kevin Smith, left, is brought down with the ball by San Francisco 49ers defensive back Perrish Cox during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith, left, hands off the ball to running back Frank Gore, right, during the fourth quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

From left, Detroit Lions guard Stephen Peterman, center Doug Hogue, and quarterback Matthew Stafford in action during the fourth quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions kicker Jason Hanson reacts during the fourth quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions running back Kevin Smith carries the ball as San Francisco 49ers free safety Dashon Goldson (38) looks on during the fourth quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions running back Kevin Smith carries the ball as quarterback Matthew Stafford, left, looks on during the fourth quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers cornerback Carlos Rogers, left, and Detroit Lions tight end Tony Scheffler, right, battle for the ball during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

The San Francisco 49ers come out onto the field at the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions quarterback Matthew Stafford during the second quarter of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Vernon Davis, right, and wide receiver Michael Crabtree, left, during the first quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers wide receiver Michael Crabtree runs onto the field before the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers defensive end Justin Smith runs onto the field at the start of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Kendall Hunter, right, carries the ball past Detroit Lions free safety John Wendling, left, during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Vernon Davis, right, and Detroit Lions middle linebacker Stephen Tulloch, left, during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Detroit Lions quarterback Matthew Stafford before of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Vernon Davis, left, and Detroit Lions defensive back Drayton Florence, right, during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Vernon Davis during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Vernon Davis during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers inside linebacker Patrick Willis during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions center Dominic Raiola (51) lines up against San Francisco 49ers defensive tackle Ray McDonald (91) and inside linebacker NaVorro Bowman (53) during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Detroit Lions middle linebacker Stephen Tulloch, left, drops the ball as San Francisco 49ers wide receiver Michael Crabtree, right, looks on during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

The San Francisco 49ers take to the field at the start of their NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

during the first quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

A large flag is displayed on the field of Candlestick Park at the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Fans at Candlestick Park cheer during the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

The Detroit Lions and San Francisco 49ers line up during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

The San Francisco 49ers and Detroit Lions take part in a coin toss at the start of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Alex Smith lines up the 49ers against the Detroit Lions during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

A large flag is displayed on the field of Candlestick Park at the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

San Francisco 49ers inside linebacker Patrick Willis during the second quarter of an NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

Two Detroit Lions fans before the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

The San Francisco 49ers take to the field at the start of their NFL football game against the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

A large flag is displayed on the field of Candlestick Park at the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)

FILE - In this Sept. 16, 2012, file photo, Detroit Lions defensive tackle Nick Fairley sits on the bunch during the third quarter of an NFL football game against the San Francisco 49ers in San Francisco. A lawyer for Fairley requested on Wednesday, Sept. 26, 2012, that the player be allowed to go through a pre-trial diversion program instead of facing a trial in Alabama. Fairley was charged with driving under the influence and attempting to elude police following a May 27 arrest. (AP Photo/Tony Avelar, File)

FILE - In this Sept. 16, 2012, file photo, San Francisco 49ers wide receiver Mario Manningham carries the ball past Detroit Lions strong safety Erik Coleman, right, during the first quarter of an NFL football game in San Francisco. Last season, Brandon Jacobs and Manningham helped the New York Giants win at San Francisco in overtime of the NFC championship on the way to another Super Bowl title. Now, they're in the Bay Area playing for Jim Harbaugh as the defending NFC West champions try to win Sunday's rematch at Candlestick Park.(AP Photo/Marcio Jose Sanchez, File)

FILE - In this Sept. 15, 2012, file photo, sportscaster Bob Costas talks before the start of an NFL football game between the San Francisco 49ers and the Detroit Lions in San Francisco. Costas stirred up a hornet's nest Sunday with a halftime commentary about Kansas City Chiefs player Jovan Belcher's murdering his girlfriend (and the mother of his child), followed by his own suicide. "If Jovan Belcher didn't possess a gun," Costas told a TV audience of more than 20 million, "he and Kasandra Perkins would both be alive today." (AP Photo/Tony Avelar, File)

FILE - In this Sept. 16, 2012, file photo, Detroit Lions kicker Jason Hanson kicks a field goal during the second quarter of an NFL football game against the San Francisco 49ers in San Francisco. The Lions announced Thursday, April 4, 2013, that Hanson is retiring from football after 21 seasons with the team. (AP Photo/Marcio Jose Sanchez, File)