Answered January 12th, 2020

I don't have anything for this season, but 25 pitchers were tied for the most games pitched in a game with 6.0+ innings pitched and 1 or fewer run allowed in 2019, with 1 game.

most season games with 6 ip by a pitcher this season in a game with 1 or fewer r
Interpreted as:
most season games with 6 or more ip by a pitcher this season in a regular-season game with 1 or fewer r

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