USC has retired the No. 13 jersey of Caleb Williams, who spent two seasons with the program and won the eighth Heisman Trophy in Trojans history.
The school made the announcement on social media, showing Williams' number displayed on the Los Angeles Coliseum peristyle among its other Heisman winners. Reggie Bush's No. 5 also was shown for the first time since his Heisman was reinstated in April.
Bush's retired number had been removed in 2010, shortly after USC received NCAA sanctions due to him receiving improper benefits during his college career from 2003 to 2005.