The Hogs have been without running back Knile Davis, defensive end Jake Bequette and defensive end Tenarius Wright. They also saw cornerbacks Isaac Madison and Darius Winston along with tackle Robert Thomas go down during the 42-38 victory over Texas A&M.
Petrino didn't discuss any of those issues Monday. He said, "We changed things up this week. We didn't see the players last night (for a practice) and we won't see them until tonight. I'll know more then."
As far as injuries, Petrino kept it simple.
"It's part of the game," he said. "Our players understand that someone will step up. That's how it works.
There was no mention of who that might could be, although the speculation might center on Bequette.
Tyler Wilson said 51 passes is the most he's thrown in a game, but that it didn't wear him out.
"Being an old baseball pitcher, 51 is a low pitch count," he said. "I think there was more in me."
At 4-1, Wilson said the team is at a "crucial point" with the Auburn game.
"It's a chance to go to 5-1 and be with the elite teams," Wilson said. "We could go into the bye week at 5-1. That is something we should understand as a team and it will be communicated in the locker room. It's a big week."
Wilson is being followed around campus by ESPN cameras in a special on the development of quarterbacks around the country.
"I guess it's pretty good timing," he said. "Really, I'm just doing the same things and they are just following me around. It's nice for our program and it says something about the way Coach Petrino develops quarterbacks."
Wilson was asked about the injury situation and the team's attitude about overcoming lost players.
"We just want to keep swinging," he said. "That's how we think. If someone goes down, someone steps in and at some point some guys will get back. If not, others are going to take their place and we keep going. That's what we do."
Defensively, Petrino said the "competitive spirit" improved in the second half, along with effort, intensity and tackling.
Petrino said the run fits were better in the second half and the tackling was better. He said the tackling improved when the defense began to tackle higher. He mentioned several points where the defensive players made critical tackles with higher hits.
"We learned a lot about ourselves," Petrino said. "What we learned is not to separate and come together. It was the best spirit we had shown. We played hard and fast. We had guys step up and lead."