The league was known as the American Professional Football Association (APFA) during the 1920 and 1921 seasons
z: best record, c: conference winner, y: division winner, w: wildcard, x: clinched playoff spot
The 1921 Louisville Breckenridges, coached by Austin Higgins, missed the postseason after finishing the NFL regular season in 21th place with a 0-2 record.