After his stint as a child actor, Warren and his twin brother Wayne A. Farlow ran track for Hollywood High School and USC. They were members of the Trojan's NCAA championship track & field team in 1961. Warren also teamed with Wayne on the USC two-mile relay team that set an American record in 1962.

Warren became a very successful & popular track and field coach at John F. Kennedy High School in Granada Hills, CA. The team won the 1980 state girls' title, 3 city sectional titles, and 15 league championships during his 27 years at the school.

His twin brother Wayne stayed in the entertainment business and has worked as a second unit director, assistant director, and production manager.