With the 49ers, Clark played on two Super Bowl championship teams. He caught the winning touchdown pass thrown by quarterback Joe Montana in the NFC Championship Game in January 1982 against the Dallas Cowboys. Clark played college football at Clemson University before being drafted by the 49ers in the 10th round of the 1979 NFL Draft. He served as the general manager of the 49ers in 1998 and in the same capacity with the Cleveland Browns from 1998 to 2002.