 Hardin was the head coach at Temple from 1970 to 1982, where he compiled an 80–50–3 record.His 80 wins are the most in school history.Hardin coached numerous future professional players at Temple including New York Jets defensive lineman Joe Klecko, Pittsburgh Steelers tight end Randy Grossman, Kansas City Chiefs cornerback Kevin Ross, San Diego Chargers linebacker Bill Singletary, and New York Jets quarterback Steve Joachim, who won the Maxwell Award in 1974 playing for the Owls.