Answered January 12th, 2020

Andy Pettitte had the most games pitched in the postseason when pitching at least 6 innings and allowing at most 2 earned runs, with 23 games.

who has the most games with 6 innings pitched and 2 or fewer earned runs in the postseason
Interpreted as:
Who has the most games with 6 or more innings pitched and 2 or fewer earned runs in the postseason?

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