New York's Mike Piazza argues with homeplate umpire Charlie Reliford after New York pitcher Roger Clemens, right, threw a piece of a broken bat at him during the first inning of Game 2 of the World Series Sunday, Oct. 22, 2000, at New York's Yankee Stadium. // 4. Clemens v. Piazza (AP Photo/Ron Frehm)

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New York's Mike Piazza argues with homeplate umpire Charlie Reliford after New York pitcher Roger Clemens, right, threw a piece of a broken bat at him during the first inning of Game 2 of the World Series Sunday, Oct. 22, 2000, at New York's Yankee Stadium.

The 2000 Subway Series between the New York Yankees and Mets saw tensions run high between Roger Clemens and Mike Piazza. The Rocket had already plunked Piazza in the head with a fastball earlier in the season during an interleague series, giving the Mets catcher a concussion. During Clemens' start in game 2, he decided to throw a portion of Piazza's broken bat toward him after Piazza fouled off a pitch. Piazza looked back at Clemens completely perplexed; meanwhile Clemens told him he "thought it was the ball." Maybe he "misrembered" what a baseball looks like. The Yankees would win in five games.

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