San Francisco Giants

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San Francisco Giants' Sergio Romo celebrates the final out against the Arizona Diamondbacks during the ninth inning of an opening day baseball game, Monday, March 31, 2014, in Phoenix. The Giants defeated the Diamondbacks 9-8. (AP Photo/Ross D. Franklin)

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San Francisco Giants' Buster Posey, left, gets a slap on the back from teammate Brandon Belt after Posey hit a two-run home run against the Arizona Diamondbacks during the ninth inning of an opening day baseball game, Monday, March 31, 2014, in Phoenix. The Giants defeated the Diamondbacks 9-8. (AP Photo/Ross D. Franklin)

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San Francisco Giants' Buster Posey connects for a 2-run home run against the Arizona Diamondbacks during the ninth inning of an opening day baseball game, Monday, March 31, 2014, in Phoenix. (AP Photo/Ross D. Franklin)

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San Francisco Giants' Madison Bumgarner throws a pitch against the Arizona Diamondbacks during the first inning of an opening day baseball game, Monday, March 31, 2014, in Phoenix. (AP Photo/Ross D. Franklin)

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Arizona Diamondbacks' Aaron Hill runs out on the field during player introductions prior to an opening day baseball game against the San Francisco Giants, Monday, March 31, 2014, in Phoenix. (AP Photo/Ross D. Franklin)

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San Francisco Giants' Pablo Sandoval turns around after striking out against the Arizona Diamondbacks during the first inning of an opening day baseball game, Monday, March 31, 2014, in Phoenix. (AP Photo/Ross D. Franklin)

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Arizona Diamondbacks' Miguel Montero, left, scores a run as San Francisco Giants' Buster Posey, right, drops the ball during the fourth inning of an opening day baseball game, Monday, March 31, 2014, in Phoenix. (AP Photo/Ross D. Franklin)

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Arizona Diamondbacks' Miguel Montero, left, argues with umpire Tom Hallion, right, after Hallion initially called Montero out at home plate until he realized San Francisco Giants catcher Buster Posey dropped the ball during the fourth inning of an opening day baseball game, Monday, March 31, 2014, in Phoenix. (AP Photo/Ross D. Franklin)