Detroit Lions president Tom Lewand, left, talks with NFL Commissioner Roger Goodell during the Lions NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive end Nick Fairley, center, walks off the field with teammates following practice at NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions running back Jahvid Best signs autographs following practice at NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

NFL Commissioner Roger Goodell meets with reporters while visiting the Detroit Lions NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

NFL Commissioner Roger Goodell takes time to sign memorabilia during his visit to the Detroit Lions NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

NFL Commissioner Roger Goodell, left, and Detroit Lions vice chairman Bill Ford Jr. watch the Lions practice during NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive tackle Nick Fairley walks off the field following practice at NFL football training camp Thursday, Aug 2, 2012, in Allen Park, Mich. NFL commissioner Roger Goodell, visiting the Lions training camp Thursday says he may discipline Fairley, who is charged with marijuana possession and a DUI in two separate cases in Alabama, before the courts have their say. (AP Photo/Duane Burleson)

Detroit Lions running back Kevin Smith snags a pass during their NFL football training camp Friday, Aug 3, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions running back Kevin Smith (30) takes a handoff from quarterback Matthew Stafford (9) during their NFL football training camp Friday, Aug 3, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions running back Kevin Smith (30) takes a break along with teammates Stephfon Green (43), Joique Bell (35) and Keiland Williams (34) during their NFL football training camp Friday, Aug 3, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions running back Stephfon Green can't make the catch during a passing drill at NFL football training camp Friday, Aug 3, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive end Willie Young takes on the hitting sled during their NFL football training camp Friday, Aug 3, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions president Tom Lewand, left, talks with Michigan football coach Brady Hoke during the Lions NFL football training camp Friday, Aug 3, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive tackle Ndamukong Suh, left, goes through a drill with defensive end Edmon McClam during their NFL football training camp Friday, Aug 3, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions linebacker Justin Durant, left, goes up against Tahir Whitehead during NFL football training camp Saturday, Aug. 4, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions linebacker Stephen Tulloch waits his turn for an agility drill during their NFL football training camp Saturday, Aug 4, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions linebackers Stephen Tulloch, left, and Tahir Whitehead run through a play during their NFL football training camp Saturday, Aug. 4, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions linebacker Andre Levy (54) is run through an agility drill by linebackers coach Matt Burke, left, during their NFL football training camp Saturday, Aug. 4, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions tackle Jeff Backus, with a cast on his broken right thumb, tosses a weighted ball during NFL football training camp Saturday, Aug. 4, 2012, in Allen Park, Mich. Backus injured his thumb on July 28. (AP Photo/Duane Burleson)

Detroit Lions guard Pat Boyle hits a pad while going through a drill during NFL football training camp Saturday, Aug. 4, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions tackle Jeff Backus (76), wearing a cast on his broken right thumb, takes a break from the workouts with his teammates Rodney Austin (74) and Dylan Gandy (65) during their NFL football training camp Saturday, Aug. 4, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive back Ricardo Silva, left, jokes with cornerback Bill Bentley (28) during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions linebackers Slade Norris (53) and Travis Lewis begin their morning workout during NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions wide receiver Jarett Dillard (12) hits a tackling dummy during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions running backs coach Sam Gash, center, works with running back Stephfon Green, left, and cornerback Dwight Bentley (28) during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions cornerback Bill Bentley, left, and defensive back Ross Weaver (38) run through a play during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions cornerback Bill Bentley, right, is outmaneuvered by wide receiver Titus Young (16) during a pass play at NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions cornerback Bill Bentley (28) heads for the field during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive backs Jacob Lacey, left, and Chris Houston, right, run coverage drills during their NFL football training camp Tuesday, Aug 14, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive back Chris Houston (23) takes a break from workouts during the NFL football training camp Tuesday, Aug 14, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive backs Ricardo Silva (39) and Chris Houston, right, run a drill during their NFL football training camp Tuesday, Aug 14, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions wide receiver Maurice Stovall (80), foreground, can't make a catch while covered by cornerback Bill Bentley, rear, during their NFL football training camp Tuesday, Aug 14, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

In this photo taken Tuesday, Aug 14, 2012, Detroit Lions punter Ryan Donahue (6) works out during their NFL football training camp in Allen Park, Mich. Donahue earned the job last season as a rookie, but a quadriceps injury midway through the season opened the door for veteran Ben Graham. (AP Photo/Duane Burleson)

In this photo taken Tuesday, Aug 14, 2012, Detroit Lions punter Ryan Donahue (6) and kicker Jason Hanson (4) talk during NFL football training camp in Allen Park, Mich. Donahue earned his job last season as a rookie and Hanson is prepping for his 21st season with the franchise. (AP Photo/Duane Burleson)