FILE - Oklahoma defensive coordinator Alex Grinch speaks during an NCAA college football news conference Tuesday, Aug. 31, 2021, in Norman, Okla. Southern California coach Lincoln Riley confirmed his full coaching staff for his debut season with the Trojans on Monday, Jan. 10, 2022. Riley's new staff is headlined by Alex Grinch, his defensive coordinator and safeties coach. Grinch followed Riley from Oklahoma last month, taking the same private plane to Los Angeles after three seasons together with the Sooners. (AP Photo/Sue Ogrocki, File)

FILE - Southern California interim head coach Donte Williams watches against Notre Dame in the second half of an NCAA college football game in South Bend, Ind., Saturday, Oct. 23, 2021. Southern California coach Lincoln Riley confirmed his full coaching staff for his debut season with the Trojans on Monday, Jan. 10, 2022, that includes Donte Williams. He will be Riley's defensive backs coach and defensive passing game coordinator after going 3-7 while serving as USC's interim head coach following the firing of Clay Helton in September.(AP Photo/Paul Sancya, File)