FILE - Then Oklahoma head coach Lincoln Riley answers a question during an NCAA college football news conference in Norman, Okla., on Aug. 31, 2021. Riley, one of college football's most successful young coaches who won 85 percent of his games in five seasons at Oklahoma and led the Sooners to four Big 12 titles and four New Year's Six bowls with three College Football Playoff appearances, has been named the head coach at USC, athletic director Mike Bohn announced Sunday, Nov. 28, 2021. (AP Photo/Sue Ogrocki, File)

Oklahoma State coach Mike Gundy, left, talks with Oklahoma coach Lincoln Riley before an NCAA college football game Saturday, Nov. 27, 2021, in Stillwater, Okla. (AP Photo/Sue Ogrocki)

FILE - Then Oklahoma head coach Lincoln Riley yells to his team before a play during the first half of an NCAA college football game against TCU, Saturday, Oct. 16, 2021, in Norman, Okla.Riley, one of college football's most successful young coaches who won 85 percent of his games in five seasons at Oklahoma and led the Sooners to four Big 12 titles and four New Year's Six bowls with three College Football Playoff appearances, has been named the head coach at USC, athletic director Mike Bohn announced Sunday, Nov. 28, 2021. (AP Photo/Alonzo Adams, File)