Offensive coordinator Todd Sturdy said "given all the new lineman in there took us a while to settle down, we weren’t running the ball extremely well which was a concern." It says they considered putting him in at the start of the 4th, but the first Int TD convinced them they were still in the game.
I understand the logic behind not wanting to throw him into a bad situation, and it seemed to work out because of Lobbestael's last drive. But when do they expect to have a better opportunity? Are they going to get good O-line play and a decent running attack against USC, Oregon, Cal, Notre Dame? Anyone?