The St. Louis Gunners have allowed the fewest rushing yards by a team in a season, with 451 yards in 1934.

which team allowed the fewest rushing yards in a 16 game season
1934Gunners1942Bears1944Eagles1982Steelers1982Raiders1943Eagles1939Bears1945Eagles1942Redskins1982Bengals1982Lions1982Bears1945Lions1964Bills1951Giants1982Packers1937Bears1982Broncos451519558762778793812817848850854902912913913932933935
StatMuse has team, season-level data for opponent rushing yards going back to the 1933 season.

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