Can't find an exact figure but from Wiki... (edited by me)
Muñoz played college football at the University of Southern California from 1976 to 1979. The Trojans won a bowl game in all four of Muñoz's seasons, including three victories in the Rose Bowl. However, injuries had cut Muñoz's freshman and junior seasons short, forcing him to miss the team's Rose Bowl wins in both years.
In the opening game of his senior year, Muñoz suffered torn knee ligaments and had to miss all of the remaining regular season games, though he did return for USC's 17–16 Rose Bowl win over the previously undefeated Ohio State University on New Year's Day in 1980.