Former Oklahoma QB Caleb Williams is transferring to USC

FILE - Oklahoma quarterback Caleb Williams (13) celebrates with fans while walking off the field after the team's team's 52-31 win over TCU in an NCAA college football game Saturday, Oct. 16, 2021, in Norman, Okla. Caleb Williams is transferring to Southern California, following his former coach Lincoln Riley from Oklahoma to the Trojans. Williams posted his long-awaited announcement on social media Tuesday, Feb. 1, 2022, a video that included the former five-star recruit in a USC uniform and famous Trojans fan Snoop Dogg rapping. (Ian Maule/Tulsa World via AP, File)

FILE - Oklahoma quarterback Caleb Williams passes the ball during the first half of an NCAA college football game against Kansas, Oct. 23, 2021, in Lawrence, Kan. College football's traditional signing period, which starts Wednesday, Feb. 2, 2022, is now overshadowed by transfer moves and Williams is the most sought after player available. (AP Photo/Charlie Riedel, File)