Five new franchises were admitted to the NFL-the New York Giants, who were awarded to Tim Mara and Billy Gibson for $500; the Detroit Panthers, featuring Jimmy Conzelman as owner, coach, and tailback; the Providence Steam Roller; a new Canton Bulldogs team; and the Pottsville Maroons, who had been perhaps the most successful independent pro team. The NFL established its first player limit, at 16 players.
Late in the season, the NFL made its greatest coup in gaining national recognition. Shortly after the University of Illinois season ended in November, All-America halfback Harold (Red) Grange signed a contract to play with the Chicago Bears. On Thanksgiving Day, a crowd of 36,000-the largest in pro football history-watched Grange and the Bears play the Chicago Cardinals to a scoreless tie at Wrigley Field. At the beginning of December, the Bears left on a barnstorming tour that saw them play eight games in 12 days, in St. Louis, Philadelphia, New York City, Washington, Boston, Pittsburgh, Detroit, and Chicago. A crowd of 73,000 watched the game against the Giants at the Polo Grounds, helping assure the future of the troubled NFL franchise in New York. The Bears then played nine more games in the South and West, including a game in Los Angeles, in which 75,000 fans watched them defeat the Los Angeles Tigers in the Los Angeles Memorial Coliseum.
Pottsville and the Chicago Cardinals were the top contenders for the league title, with Pottsville winning a late-season meeting 21-7. Pottsville scheduled a game against a team of former Notre Dame players for Shibe Park in Philadelphia. Frankford lodged a protest not only because the game was in Frankford's protected territory, but because it was being played the same day as a Yellow Jackets home game. Carr gave three different notices forbidding Pottsville to play the game, but Pottsville played anyway, December 12. That day, Carr fined the club, suspended it from all rights and privileges (including the right to play for the NFL championship), and re-turned its franchise to the league. The Cardinals, who ended the season with the best record in the league, were named the 1925 champions.