1925 Chicago Cardinals season

The 1925 Chicago Cardinals season marked the sixth year of the club in the National Football League (NFL). Playing all of their games in the city of Chicago, the team finished with a record of 12–2–1, tops in the league in terms of winning percentage. In an attempt to ensure a league championship, the Cardinals played a hastily-scheduled game against a new club, the Milwaukee Badgers, who included several high school students among its ranks, resulting in a contested championship. The 59–0 game was supposed to be erased from the record books but never was.

The Pottsville Maroons, who defeated the Cardinals in league play, were ostensibly the champions of 1925, but their title was stripped when the team was suspended from the NFL in December. The Cardinals were instead proclaimed 1925 champions — a decision that remains controversial among football historians.