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Catcher Buster Posey, seen here during a spring training workout Sunday, has been told by the San Francisco Giants that he should avoid blocking home plate. Posey broke his leg on a scoring play at the plate last season. Darron Cummings/AP hide caption

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Darron Cummings/AP

Gary Carter slides over home plate during a New York Mets game in the 1989 season. The Hall of Fame player died Thursday, of brain cancer. Rick Stewart/Getty Images hide caption

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Rick Stewart/Getty Images

Mike Napoli of the Texas Rangers reacts after first base umpire Ron Kulpa calls Matt Holliday of the St. Louis Cardinals safe in the fourth inning of game three of the World Series.

Ezra Shaw/Getty Images hide caption

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Ezra Shaw/Getty Images