Papa Bear : The Life and Legacy of George Halas: Jeff Davis, Gale Sayers: 9780071422062: : Books

George Halas changed the way Americans spend their Sundays. He founded the National Football League and created its storied franchise, the Chicago Bears. He is considered the father of pro football, as he grabbed an outlaw sport by its throat, shook it, led it into respectability, and made it into the richest and most popular spectator sport on the earth.