Leland Clark began his successful 32-year coaching career as an Assistant Wrestling Coach at John Marshall High School from 1967 to 1970. John Marshall won the State high school wrestling championships those three years. In the 1970-71 season he was the Head Wrestling Coach at U.S. Grant High School and his teams were the All City Champions. Clark was named the All City Coach. He continued to coach at Grant one more year and organized the Little League Program. After resigning his teaching position there, Clark continued coaching at the Northside YMCA for three years and the Tinker YMCA for seven years. From 1972 through 1981 his teams won the YMCA Championships and twice won the Tulsa National Championships. In 1989, after many years out of the teaching profession, Clark accepted a teaching/coaching position at Harrah Junior High and he received the Onions Martin Award for his contributions to wrestling. He continued to coach at Harrah until 1995, when he moved to Monroney Junior High. His Monroney teams were conference champions from 1995 to 1998. They won the 1999 Junior High State Championship and the All State Junior High Championship and Clark was named the Outstanding Junior High State Coach and the Outstanding All State Junior High Coach. Clark not only coached wrestling, but he was one of the organizers and developers of the first Junior High All State Wrestling Tournament. He has been the Director of that tournament since 1975 to the present. He was also the Director of the Oklahoma Secondary Association State High School Wrestling Tournament, all classes, from 1979 until 1990.