Smith had a 143-126-7 record in 24 years as a head coach at the four programs. He had a 44-25-3 mark at USC from 1987 to 1992, with three Rose Bowl appearances.
Smith played collegiate football at Miami of Ohio, where he later coached. Smith followed Bo Schembechler to Michigan for three years, before heading to Arizona to be defensive coordinator.
After a stint as the head coach at Tulane, he took over at Arizona in 1980.