Kyler Murray sat out the Sooners' first offensive series then came on to pass for 432 yards and six touchdowns to help No. 6 Oklahoma defeat Baylor 66-33 on Saturday.
Austin Kendall opened the game, but Murray entered on the second possession and played nearly flawless football. His passing touchdown total tied for second-best in school history behind Baker Mayfield's seven against Texas Tech in 2016. The school would not say why Murray didn't start.
Murray also ran for 45 yards and a score for the Sooners (5-0, 2-0 Big 12).
Marquise Brown caught five passes for 132 yards and two touchdowns, CeeDee Lamb had 101 yards receiving and Lee Morris caught two touchdown passes for the Sooners.
Charlie Brewer passed for 400 yards and two touchdowns. Denzel Mims had 11 catches for 114 yards and a touchdown and Jalen Hurd added nine catches for 104 yards and had a receiving touchdown and a rushing score for the Bears (3-2, 1-1).
Murray completed 10 of 11 passes for 192 yards and four touchdowns in the first half to help the Sooners take a 28-9 lead. Baylor scored on its first possession of the second half to cut Oklahoma's lead to 28-16, but Lamb turned a third-down screen pass from Murray into an 86-yard touchdown.
Murray threw a 50-yard touchdown pass to Brown later in the third quarter, then scored on a 1-yard quarterback sneak on an untimed down on the last play of the period to put the Sooners up 49-23.
Oklahoma looked more like the dominant team that opened the season. The Sooners might not move up in the poll, but they likely solidified their current position.
Oklahoma plays Texas in Dallas on Saturday. This will be the first time since 2015 that the Sooners enter the rivalry game undefeated.