Short answers, pulled from the story.
Jim Thorpe was a Sac and Fox Olympic champion and the Canton Bulldogs' most-recognized player in the pre-NFL era. He joined Canton in 1915 for $250 a game, later served as player-coach, and was named the first permanent president of the American Professional Football Association in 1920.
The Canton Bulldogs went 25 straight games without a defeat between 1921 and 1923, including three ties. That mark stood as an NFL record until 2025, when the league recognized the All-America Football Conference's records.
The Canton Bulldogs were NFL champions in 1922 and 1923, going 10-0-2 and 11-0-1 in those seasons under player-coach Guy Chamberlin. They had earlier won Ohio League championships in 1916, 1917, and 1919.
The Pro Football Hall of Fame sits in Canton because the NFL's predecessor league, the American Professional Football Association, was organized there in a Canton automobile showroom on the 17th of September 1920, and because the Canton Bulldogs were one of the sport's early powers. Citizens raised $378,026 after a 1959 Canton Repository editorial, and the Hall opened on the 7th of September 1963.
In 1924, Cleveland promoter Samuel Deutsch bought the Canton Bulldogs, added seven of its players to his roster, and renamed the combined team the Cleveland Bulldogs, which won the 1924 NFL championship. Deutsch later sold the Canton franchise back to local investors for $3,000, and the Canton Bulldogs returned to the NFL in 1925.
No source explains exactly how the nickname Bulldogs attached to the Canton team; it appeared suddenly during the 1906 season after earlier being called Canton A.C., C.A.C., or Wallace's Men. A cartoon published on the 14th of November 1906 by Canton Repository artist R.C. Johnson was the first to depict an actual Canton Bulldog.