Oklahoma had too many turnovers in the first half and Baylor got most of their points from that. Additionally the Oklahoma defense alignments were in a coverage scheme. That left the Baylor QB too much time to find receivers. He was never rushed and Oklahoma’s secondary was clearly in a mismatch position.
In the second half the Offense settled down and quit turning over the ball. As a result they put points on the board. The defensive scheme was changed to a press mode and the Baylor QB apparently isn’t an accurate mobility passer and the running game was shut down. The result was that Baylor didn’t score in the second half. It was an incredible comeback and Hurts was effective.