The front of the sports page of the Chicago Tribune on November 23, 1925. Bears Sign Red Grange - Chicago Tribune

Red Grange signs with the Bears in 1925, flanked by (from left) Ed Sternaman, George Halas and Grange's agent Charles C. Pyle. Bears Sign Red Grange - Chicago Tribune

The signing of University of Illinois star Red Grange was a turning point for the Bears franchise and for professional football as a whole. Bears Sign Red Grange - Chicago Tribune

Red Grange, left, and Bronko Nagurski are shown in an action pose on Sept. 13, 1930. (AP Photo) Bears Sign Red Grange - Chicago Tribune

Red Grange (left) and George Halas were Bears teammates in 1925. Bears Sign Red Grange - Chicago Tribune

Red Grange, right, takes a ride with his father Lyle Grange, circa 1926. Bears Sign Red Grange - Chicago Tribune

Red Grange stands on the sideline during a game against the Giants in New York in 1925. Bears Sign Red Grange - Chicago Tribune

Bears halfback Harold Edward "Red" Grange practicing one of the famous twisting turns at the training quarters Sept. 11, 1925. (AP Photo) Bears Sign Red Grange - Chicago Tribune

Bears halfback Harold "Red" Grange. (AP Photo) Bears Sign Red Grange - Chicago Tribune

Bears halfback Harold "Red" Grange. (AP Photo/Pro Football Hall of Fame) Bears Sign Red Grange - Chicago Tribune

Vertical view of the front of the sports page of the Chicago Tribune on November 23, 1925. Bears Sign Red Grange - Chicago Tribune