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San Francisco Giants' Buster Posey (28) watches the ball leave left field for a two-run walk-off home run to win the game 4-2 against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

Baseball fans react to San Francisco Giants' Buster Posey's (28) two-run walk-off home run to win the game 4-2 against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Buster Posey (28) heads to first base as he watches the ball leave left field for a two-run walk-off home run to win the game 4-2 against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Angel Pagan (16) heads to third base on his way to home plate after San Francisco Giants' Buster Posey (28) hit a two-run walk-off home run to win the game 4-2 against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Hunter Pence (8) runs past Colorado Rockies' D.J. LeMahieu (9) at second base for third base in the third inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants starting pitcher Tim Hudson (17) throws against the Colorado Rockies in the first inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

Colorado Rockies' starting pitcher Franklin Morales (56) throws against the San Francisco Giants in the sixth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Joe Panik (12) throws to first for an out against the Colorado Rockies in the second inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

Colorado Rockies' Corey Dickerson (6) heads to third base after hitting a solo home run against the San Francisco Giants in the fifth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

Colorado Rockies' Corey Dickerson (6) high-fives the dugout after hitting a solo home run against the San Francisco Giants in the fifth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

Colorado Rockies' Drew Stubbs (13) high-fives Colorado Rockies' Nolan Arenado (28) after Stubbs scored to tie the game at 2-2 on a double hit by /Colorado Rockies' Justin Morneau (33) during their game against the San Francisco Giants in the ninth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Michael Morse (38) hits to deep center field for a double against the Colorado Rockies in the second inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

Colorado Rockies' Charlie Blackmon (19) and Colorado Rockies' Drew Stubbs (13) chase after a ball in deep centerfield on a double hit by San Francisco Giants' Michael Morse (38) in the second inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Michael Morse (38) holds up at second base after hitting a ball to deep centerfield against the Colorado Rockies in the second inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Gregor Blanco (7) strikes out with two men on to end the second inning in front of Colorado Rockies catcher Michael McKenry (8) at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Gregor Blanco (7) walks off the field after striking out with two men on to end the second inning during their game against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Hunter Pence (8) hits a base hit against the Colorado Rockies in the third inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Matt Duffy (50) makes a catch for an out against the Colorado Rockies in the second inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants starting pitcher Tim Hudson (17) talks to San Francisco Giants' Buster Posey (28) after the end of the top of the second inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants starting pitcher Tim Hudson (17) celebrates a double play to end the top of the fourth inning during their game against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Matt Duffy (50) heads to second base on his double against the Colorado Rockies in the fourth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants starting pitcher Tim Hudson (17) celebrates a double play to end the top of the fourth inning during their game against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Joe Panik (12) hits a single against the Colorado Rockies in the fourth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Hunter Pence (8) heads back to the dugout after striking out against the Colorado Rockies in the fifth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Buster Posey (28) is congratulated at home plate after hitting a two-run walk-off home run to win the game 4-2 against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Buster Posey (28) watches the ball leave left field for a two-run walk-off home run to win the game 4-2 against the Colorado Rockies at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants starting pitcher Tim Hudson (17) throws against the Colorado Rockies in the sixth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Angel Pagan (16) scores a run against Colorado Rockies catcher Michael McKenry (8) in the seventh inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Angel Pagan (16) tossest the ball to Colorado Rockies catcher Michael McKenry (8) in the seventh inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Angel Pagan (16) hits a single against the Colorado Rockies in the ninth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

Colorado Rockies' starting pitcher Franklin Morales (56) throws against the San Francisco Giants in the first inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Matt Duffy (50) heads to third base on a single by San Francisco Giants' Joe Panik (12) during their game against the Colorado Rockies in the fourth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Angel Pagan (16) hits a single against the Colorado Rockies in the ninth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

Colorado Rockies' Justin Morneau (33) hits a double which scored Colorado Rockies' Drew Stubbs (13) to tie the game at 2-2 against the San Francisco Giants in the ninth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants pitching coach Dave Righetti (33), in jacket, talks to San Francisco Giants' Santiago Casilla (46) on the mound during their game against the Colorado Rockies in the ninth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. Casilla had just given up a one run double. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )

San Francisco Giants' Santiago Casilla (46) throws against the Colorado Rockies in the ninth inning at AT&T Park in San Francisco, Calif., on Wednesday, Aug. 27, 2014. (Nhat V. Meyer/Bay Area News Group) ( SJM-GIANTS-0828 )