Chicago Cubs

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Chicago Cubs starting pitcher Jeff Samardzija throws in the second inning against the Pittsburgh Pirates during their opening day baseball game on Monday, March 31, 2014, in Pittsburgh. (AP Photo/Gene Puskar)

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Pittsburgh Pirates manager Clint Hurdle, left, follows first base umpire Bob Davidson, from the field after he requested a review on a safe call at first on a pickoff attempt in the tenth inning of the opening day baseball game against the Chicago Cubs on Monday, March 31, 2014, in Pittsburgh. Cubs' Emilio Bonifacio was called safe but the call was overturned on the review requested by Hurdle and Bonifacio was ruled out. The Pirates won 1-0 in ten innings.(AP Photo/Keith Srakocic)

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First base umpire Bob Davidson, right, and home plate umpire John Hirschbeck, center, talk over headsets as a pickoff safe call at first base is reviewed in the tenth inning of an opening day baseball game against the Chicago Cubs on Monday, March 31, 2014, in Pittsburgh. The safe call was overturned and Cubs' Emilio Bonifacio was ruled out. The Pirates won 1-0 in ten innings. (AP Photo/Gene J. Puskar)

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Home plate umpire John Hirschbeck, left, makes the out call at first base after he and first base umpire Bob Davidson (61) were asked by the Pirates for a review of a pickoff safe call at first base in the tenth inning of an opening day baseball game against the Chicago Cubs on Monday, March 31, 2014, in Pittsburgh. The safe call was overturned and Cubs' Emilio Bonifacio was ruled out. The Pirates won 1-0 in ten innings. (AP Photo/Gene J. Puskar)

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In this photo taken with a fisheye lens, baseball fans at in PNC Park watch the season opening baseball game between the Pittsburgh Pirates and the Chicago Cubs in Pittsburgh, Monday, March 31, 2014. The Pirates won 1-0 in ten innings.(AP Photo/Gene J. Puskar)

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Baseball fans line up outside PNC Park near the statue of Hall of Fame Pittsburgh Pirates shortstop Honus Wagner before the opening day baseball game between the Pittsburgh Pirates and the Chicago Cubs on Monday, March 31, 2014, in Pittsburgh. (AP Photo/Gene Puskar)

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The Chicago Cubs line up along the first base line during opening day ceremonies before the baseball game between the Pittsburgh Pirates and the Chicago Cubs on Monday, March 31, 2014, in Pittsburgh. (AP Photo/Gene Puskar)

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Pittsburgh Pirates' Neil Walker (18) is greeted by teammates after hitting a walk-off solo-home run off Chicago Cubs relief pitcher Carlos Villanueva during the tenth inning of a baseball game in Pittsburgh Monday, March 31, 2014. The Pirates won 1-0 in ten innings.(AP Photo/Gene J. Puskar)

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Pittsburgh Pirates' Neil Walker (18) is greeted by teammates after hitting a walk-off solo-home run off Chicago Cubs relief pitcher Carlos Villanueva during the tenth inning of a baseball game in Pittsburgh Monday, March 31, 2014. The Pirates won 1-0 in ten innings.(AP Photo/Gene J. Puskar)