At the time of the founding of the modern National Football League, the Cardinals were part of a thriving professional football circuit based in the Chicago area. Teams such as the
Decatur Staleys,
Hammond Pros,
Chicago Tigers and the Cardinals had formed an informal loop similar to, and generally on par with, the
Ohio and
New York circuits that had also emerged as top football centers prior to the league's founding. In
1920, the team became a charter member of the American Professional Football Association (later renamed the
National Football League (NFL) in
1922), for a franchise fee of
$100. The Cardinals and the
Chicago Bears (the latter founded as the Decatur Staleys before moving to Chicago in 1921 and being renamed the Chicago Staleys, then in 1922 being renamed the Chicago Bears) are the only charter members of the NFL still in existence, though the
Green Bay Packers, which joined the league in 1921, existed prior to the formation of the NFL. The person keeping the minutes of the first league meeting, unfamiliar with the nuances of Chicago football, recorded the Cardinals as from
Racine, Wisconsin. The team was renamed the "Chicago Cardinals" in 1922 after a team actually from Racine, Wisconsin (the
Horlick-Racine Legion) entered the league. That season the team moved to
Comiskey Park. The
Staleys and
Cardinals played each other twice in 1920 as the Racine Cardinals and the Decatur Staleys, making their rivalry the oldest in the NFL. They split the series, with the home team winning in each. In the Cardinals' 7–6 victory over the Staleys in their first meeting of the season, each team scored a touchdown on a fumble recovery, with the Staleys failing their
extra point try. The Cardinals' defeat of the Staleys proved critical, since
George Halas's Staleys went on to a 10–1–2 record overall, 5–1–2 in league play. The
Akron Pros were the first ever league champions; they finished with an 8–0–3 record, 6–0–3 in league play, ending their season in a scoreless tie against the Staleys. Since the Pros merely had to tie the game in order to win the title, they could afford to play not to lose. Had the Staleys not lost to the Cardinals, they would have gone into that fateful game with an 11–0–2 record, 6–0–2 in league play. As it was, it all but assured that the Staleys/Bears and Cardinals would be intense rivals. The two teams played to a tie in
1921, losing to the Cardinals twice. The Bears still edged the
Cardinals for second place in the league, but those losses dashed all hopes of the Bears repeating as champions. In
1923 and
1924, the Bears got the better of the Cardinals all three times the two teams played. But in
1925, the
Bears went 0–1–1 against the
Cardinals with the tie meaning the Cardinals were only a game in front of the
Pottsville Maroons heading into their fateful 1925 showdown. The color ban faced by Slater and other black players was not ironclad, however, and four other African-American players managed to draw salaries in the NFL during short careers interspersed from 1928 through 1933. On November 28, 1929, Slater participated in an NFL record as a lineman in front of Ernie Nevers in a game in which he scored six rushing touchdowns in a 40–6 victory over the Chicago Bears. == 1930s ==