Baltimore Orioles starting pitcher Jason Hammel throws to a Detroit Tigers batter in the first inning of a baseball game in Baltimore, Friday, July 13, 2012. (AP Photo/Patrick Semansky)

Detroit Tigers starting pitcher Doug Fister throws to the Baltimore Orioles in the third inning of a baseball game in Baltimore, Friday, July 13, 2012. (AP Photo/Patrick Semansky)

Detroit Tigers' Alex Avila high-fives teammates in the dugout after scoring on a double by Ryan Raburn in the fourth inning of†a baseball game†against the Baltimore Orioles in Baltimore, Friday, July 13, 2012. (AP Photo/Patrick Semansky)

Baltimore Orioles starter Jason Hammel reacts after throwing a pitch in the fourth inning of a baseball game against the Detroit Tigers in Baltimore, Friday, July 13, 2012. Hammel was immediately pulled from the game. (AP Photo/Patrick Semansky)

Baltimore Orioles manager Buck Showalter watches as starting pitcher Jason Hammel waits to catch a ball after injuring his right knee in the fourth inning of†a baseball game against the Detroit Tigers in Baltimore, Friday, July 13, 2012. After a few practice tosses, Hammel left the game. (AP Photo/Patrick Semansky)

Baltimore Orioles first baseman Mark Reynolds falls onto a tarp as he catches a pop fly by Detroit Tigers' Jhonny Peralta in the fourth inning of a baseball game in Baltimore, Friday, July 13, 2012. (AP Photo/Patrick Semansky)

Detroit Tigers' Miguel Cabrera, right, high-fives manager Jim Leyland after scoring a run on a single by Brennan Boesch in the first inning of†a baseball game against the Baltimore Orioles in Baltimore, Friday, July 13, 2012. Detroit won 7-2. (AP Photo/Patrick Semansky)

Baltimore Orioles designated hitter Jim Thome walks off the field after striking out swinging in the ninth inning of†a baseball game against the Detroit Tigers in Baltimore, Friday, July 13, 2012. Thome was hitless in four at-bats. Detroit won 7-2. (AP Photo/Patrick Semansky)

Detroit Tigers starting pitcher Doug Fister follows through on a pitch to the Baltimore Orioles in the seventh inning of a baseball game in Baltimore, Friday, July 13, 2012. Detroit won 7-2. (AP Photo/Patrick Semansky)

FILE - In this July 13, 2012, file photo, Baltimore Orioles relief pitcher Luis Ayala throws to the Detroit Tigers during a baseball game in Baltimore. The Atlanta Braves have bolstered their bullpen depth by acquiring Ayala on Wednesday, April 10, 2013, from the Orioles, for a minor league pitcher Chris Jones. (AP Photo/Patrick Semansky, File)