Scott Cousins, Buster Posey

(AP Photo/Marcio Jose Sanchez)

Florida Marlins' Scott Cousins, top, collides with San Francisco Giants catcher Buster Posey (28) on a fly ball from Emilio Bonifacio during the 12th inning of a baseball game in San Francisco, Wednesday, May 25, 2011. Cousins was safe for the go ahead run and Florida won 7-6.

Scott Cousins, Buster Posey

(AP Photo/Marcio Jose Sanchez)

Florida Marlins' Scott Cousins, top, collides with San Francisco Giants catcher Buster Posey (28) on a fly ball from Emilio Bonifacio during the 12th inning of a baseball game in San Francisco, Wednesday, May 25, 2011. Cousins was safe for the go ahead run and Florida won 7-6.

Scott Cousins, Buster Posey

(AP Photo/Marcio Jose Sanchez)

San Francisco Giants catcher Buster Posey (28) is tended by trainers after a collision with Florida Marlins' Scott Cousins on a fly ball from Emilio Bonifacio during the 12th inning of a baseball game in San Francisco, Wednesday, May 25, 2011. Cousins was safe for the go ahead run and Florida won 7-6. (AP Photo/Marcio Jose Sanchez)

Buster Posey, Bruce Bochy, Dave Groeschner

(AP Photo/Ben Margot)

San Francisco Giants head trainer Dave Groeschner, right, and manager Bruce Bochy, center, check on the condition of catcher Buster Posey after Posey was hit by a pitch thrown by Oakland Athletics' Jonathan Sanchez in the second inning of an interleague baseball game, Sunday, May 22, 2011, in San Francisco.

Buster Posey

(AP Photo/Marcio Jose Sanchez)

San Francisco Giants catcher Buster Posey (28) is carried off the field after a collision with Florida Marlins' Scott Cousins during the 12th inning of a baseball game in San Francisco, Wednesday, May 25, 2011. Cousins scored the go-ahead run on the play as Florida won 7-6.