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The winning pitcher is determined based on the score of the game such as for example if Greinke started a game for the Diamondbacks and they're winning after 5 innings he would be eligible for a win however if he were to leave the game before 5 innings are completed then it would be up to the home team's official scorer to make that call based on who he or she believed gave the best performance out of the bullpen.

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โˆ™ 2015-12-11 14:44:55
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Q: What determines winning pitcher in MLB?
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