The 1920 season was the Decatur Staleys 2nd season of existence, the first professional season of the franchise that would go on to be known as the Chicago Bears and their first under head coach George Halas, competing in the newly formed American Professional Football Association.

The team improved on their 6–1 record from 1919 to a 10–1–2 record and earning them a second-place finish in the league standings. In the last league game of the season, the Staleys needed a win versus Akron to have a chance at the title. Akron, predictably, played for a tie, achieved that, and won the first APFA title.

1920 Decatur Staleys season

The stars of the Staleys were Ed "Dutch" Sternaman, Jimmy Conzelman, and George Halas. Sternaman had a remarkable season with 11 rushing TDs, 1 receiving TDs, 4 field goals, and 3 PATs, totaling 87 points scored out of the Staleys' total of 164. Jimmy Conzelman ran for two scores and threw two more. Halas led the team in receiving scores with 2.

1920 Decatur Staleys season

Offseason

The Decatur Staleys finished 6–1 in their 1919 season as an independent team. Their 1919 owner, George Chamberlain, asked George Halas to help manage the team, and Halas accepted. After the 1919 season, representatives of four Ohio League teams—the Canton Bulldogs, the Cleveland Tigers, the Dayton Triangles, and the Akron Pros—called a meeting on August 20, 1920, to discuss the formation of a new league. At the meeting, they tentatively agreed on a salary cap and pledged not to sign college players or players already under contract with other teams. They also agreed on a name for the circuit: the American Professional Football Association. They then invited other professional teams to a second meeting on September 17.

1920 Decatur Staleys season

At that meeting, held at Bulldogs owner Ralph Hay's Hupmobile showroom in Canton, representatives of the Rock Island Independents, the Muncie Flyers, the Decatur Staleys, the Racine Cardinals, the Massillon Tigers, the Chicago Cardinals, and the Hammond Pros agreed to join the league. Representatives of the Buffalo All-Americans and Rochester Jeffersons could not attend the meeting, but sent letters to Hay asking to be included in the league. Team representatives changed the league's name slightly to the American Professional Football Association and elected officers, installing Jim Thorpe as president. Under the new league structure, teams created their schedules dynamically as the season progressed, so there were no minimum or maximum number of games needed to be played. Also, representatives of each team voted to determine the winner of the APFA trophy.

Schedule

If a team has a dagger (), then that team is in a non-APFA team. For the attendance, if a cell is greyed out and has "N/A", then that means there is an unknown figure for that game. The green-colored cells indicates a win; the yellow-colored cells indicates a tie; and the red-colored cells indicate a loss.

Game summaries

Week 4: at Rock Island Independents

October 17, 1920, at Douglas Park

After two games against non-APFA teams, the Staleys played against the APFA Rock Island Independents.

Week 7: at Rock Island Independents

November 7, 1920, at Douglas Park

On a five-game winning streak, the Staleys played against the Independents again. The game ended in a 0–0 tie. Several injuries occurred throughout the game for the Independents. Sid Nichols, Fred Chicken, and Oke Smith injured their knees on different plays. Harry Gunderson was hit late by George Trafton and the former had to get thirteen stitches on his face, and his hand was broken.

Week 8: at Minneapolis Marines

November 14, 1920, at Nicollet Park

To conclude their six-game road game streak, the Staleys played against the Minneapolis Marines. The Marines were a non-APFA team but joined the league in 1921. The only score of the game was a 25-yard field goal from Sternaman.