Since 2014, 5 teams are tied for the most first downs in a game, with 36 first downs. The first three are the New Orleans Saints on December 25, the Kansas City Chiefs on November 22 and the Los Angeles Rams on September 29, 2019.

most first downs by a team in a game since 2014
Interpreted as:
most first downs by a team in a regular-season game since 2014

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