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Mystery pitcher

From BR Bullpen

The term mystery pitcher was coined by Philadelphia Inquirer baseball columnist Jayson Stark. It refers to a position player who comes in to pitch in the late innings of a blowout loss. Sometimes, a mystery pitcher is forced to enter an extra inning game when the bullpen has been emptied of available pitchers. The last mystery pitchers to win a game were Brent Mayne in 2000 and Wilson Valdez in 2011.

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