New York Yankees relief pitcher Mariano Rivera tips his cap in the ninth inning of his final appearance in a baseball game at Yankee Stadium, against the Tampa Bay Rays on Thursday. Kathy Willens/ap hide caption

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This is what all the fuss was about: One of the Mariano Rivera bobblehead dolls that were eventually given away Tuesday night at Yankee Stadium. Kathy Willens/AP hide caption

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Up close and personal: Cincinnati Reds second baseman Brandon Phillips, left, reaches back to tag out Houston Astros' Jonathan Villar during Tuesday's game in Houston. Pat Sullivan /AP hide caption

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New York Yankees third baseman Alex Rodriguez is hit by a pitch (you can see the ball just above his belt on the left side of his body) in the second inning of Sunday's game against the Boston Red Sox. He came back four innings later to hit a decisive home run. Dominick Reuter /Reuters/Landov hide caption

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The knuckleball grip used by Boston Red Sox pitcher Steven Wright. Good fingernails are important. Marvin Fong /The Plain Dealer /Landov hide caption

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Have bat, will travel: Casper Wells just before the start of the season, when he was with the Seattle Mariners. Four stops later, he's landed with the Philadelphia Phillies. Christian Petersen/Getty Images hide caption

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Alex Rodriguez during a July 13 game in Florida, where he was playing for the minor league Tampa Yankees while trying to recover from recent injuries. Mike Carlson /Reuters /Landov hide caption

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Pitcher R.A. Dickey of the Toronto Blue Jays throws a knuckleball against the Tampa Bay Rays at Tropicana Field in St. Petersburg, Florida. J. Meric/Getty Images hide caption

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