Robert Park began his coaching career in 1988 with Sperry Public Schools as an assistant high school wrestling coach and head junior high school wrestling coach. He became head wrestling coach in 1993 and later added head football coach to his duties. Park led Sperry to the Oklahoma Dual Team and State Team titles in 1989 and to the Dual Team title again in 1992. He has a career record of 190-62 and has coached 18 state champions, multiple state-placers and qualifiers, and 10 All-State wrestlers. He was Region 7 Coach of the Year in 2004 and was the East All-State coach in 2001. On the mat, he was an Oklahoma state champion and All-State wrestler for Sperry in 1984 and wrestled at Northeastern Oklahoma A&M College.