Answered January 12th, 2020

I couldn't find anything for this season, but 21 pitchers were tied for the most games pitched in a game with 7.0+ innings pitched and 1 or fewer run allowed in 2019, with 1 game.

most season games with 7 ip by a pitcher this season in a game with 1 or fewer r
Interpreted as:
most season games with 7 or more ip by a pitcher this season in a regular-season game with 1 or fewer r

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