Teachers College in Warrensburg, Missouri. Allen began classes at the University of Kansas in 1904, where he lettered three years in basketball under James Naismith's coaching, and two years in baseball. In 1905 he also played for the Kansas City Athletic Club. At Kansas he was a member of Phi Kappa Psi Fraternity. Allen launched his coaching career at his alma mater in 1907, but took a hiatus after graduating in 1909 to study osteopathic medicine at Central College of Osteopathy in Kansas City, Missouri. Known as “Doc” to his players and students, he was reputed to be a colorful figure on the University of Kansas campus, coaching all sports and becoming known for his osteopathic manipulation techniques for ailing athletes. Allen was a legend in the field of treatment of athletic injuries and benefited a long list of high-profile performers. He also had a successful private osteopathic practice, and many he treated, the famous and otherwise, contended he had a "magic touch" for such ailments as bad backs, knees and ankles. He said he applied the same treatments to "civilians" as he did to his athletes. His forceful, yet reasonable, disposition helped him become the driving force behind the acceptance of basketball as an official Olympic sport at the 1936 Summer Olympic Games. Allen later worked as an assistant coach in the 1952 Summer Olympics, helping to lead the United States to the gold medal in Helsinki, Finland. He coached college basketball for 50 seasons, and compiled a 746–264 record, retiring with the all-time record for most coaching wins in college basketball history at the time. During his tenure at Kansas, Allen coached Dutch Lonborg, Adolph Rupp, Ralph Miller and Dean Smith, all future Hall of Fame coaches. He also coached John Bunn, who is a member of the Hall of Fame and did go on to coach at Stanford, but he is honored as a contributor to the game of basketball. Additional former players that make up Allen's coaching tree who coached at the collegiate level but are not enshrined in the Hall of Fame include Frosty Cox, George E. Rody, Andrew McDonald, Charlie T. Black, Howard Engleman and his replacement upon retirement Dick Harp. Among the Hall of Fame players he coached were Paul Endacott, Bill Johnson, and Clyde Lovellette. He also recruited Wilt Chamberlain to Kansas, and even coached former United States Senate Majority Leader Bob