Oklahoma made changes at offensive coordinator ahead of Saturday’s game against Ole Miss, firing Seth Litrell following the South Carolina loss. Brent Venables is switching things up at quarterback too, going back to Jackson Arnold after benching him earlier in the year. True freshman Michael Hawkins will return to the backup role after getting three starts, a stretch where the Sooners went 1-2 and mightily struggled offensively. CLICK HERE to go to PrizePicks and use code ON3 to receive a guaranteed $50 once you play $5 in lineups! “Venables says Jackson Arnold will be the starting quarterbac…