Lee Roy Selmon (October 20, 1954 – September 4, 2011) was a Hall of Fame NFL football defensive lineman.

Selmon was the youngest of nine children of Lucious and Jessie Selmon, raised on a farm near Eufaula, Oklahoma. A National Honor Society member at Eufaula High School, he graduated in 1971.

Selmon joined brothers Lucious and Dewey Selmon on the University of Oklahoma defensive line in 1972. He blossomed into a star in 1974, anchoring one of the best defenses in Sooner history. The Sooners were NCAA Division I-A national football champions in 1974 and 1975. Selmon won the Lombardi Award and the Outland Trophy in 1975. OU Head Coach Barry Switzer called him the best player he ever coached, and College Football News placed him as the 39th best college player of all time. He was known as "The Gentle Giant." In the fall of 1999, Selmon was named to the Sports Illustrated NCAA Football All-Century Team.

Selmon was named a consensus All-American in 1974 and 1975 by Newspaper Enterprise Association. His long list of achievements, in addition to the Vince Lombardi Award and the Outland Trophy, includes the National Football Foundation Scholar-Athlete, GTE/CoSIDA Academic All-American and Graduate Fellowship Winner National Football Foundation and Hall of Fame.