In his 39 seasons at the helm of the Kansas Jayhawks men's basketball program, his teams won 24 conference championships[2] and three national titles.

Allen attended the University of Kansas, having already acquired the nickname "Phog" for the distinctive foghorn voice he had as a baseball umpire.

[3]The home basketball arena at the University of Kansas, Allen Fieldhouse, was named in his honor when it opened in 1955.

After graduating from medical school, Allen integrated numerous concepts of healthy eating, efficient exercise regimens, and proper body alignment into his coaching.

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.

Allen later worked as an assistant coach in the 1952 Summer Olympics,[10] helping to lead the United States to the gold medal in Helsinki, Finland.

[citation needed] 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.

He also recruited Wilt Chamberlain to Kansas, and even coached former United States Senate Majority Leader Bob Dole.

A banner that hangs in the rafters of Allen Fieldhouse reads: "Pay heed all who enter, beware of the Phog."