that BYU was always in a place to win the game so they kept him in (I'm sure there was more to the decision but ARod noted that specifically).
A follow up question was asked about when it would be time to pull Retzlaff...ARod said that nobody on the team can turn the ball over repeatedly without repercussions. He went on to say they're very confident in GBo should that time come.
So he definitely opened the door to pulling Retzlaff if he doesn't clean up his turnovers