The Trojans defeated Notre Dame, 49-14, on Saturday.
USC finished the regular season with an 8-4 record and now awaits its bowl fate. Bowl game matchups will be announced Sunday.
USC had a No. 19 CFP ranking before it played UCLA on Nov. 22.
The Trojans fell out of the top 25 after their 38-20 defeat by the Bruins.
But they reappeared Tuesday after sending Notre Dame to its fourth consecutive defeat.