Petrino was asked if he worried how Mallett would bounce back this week after the concussion.
"You always worry because of the past history I've had with (concussions)," Petrino said. "You knock on wood. But he's had zero headaches this week."
Later, Petrino was asked point blank if Mallett would start.
"Oh, yeah," Petrino said. "Going into this game, Ryan is our quarterback. Nothing is different this week."
Did Wilson's performance change anything in Petrino's mind?
"Well, it makes you sleep better," Petrino said. "I've always had a lot of confidence in Tyler. But I think he's more confident in himself. I think he also helped the confidence of his teammates in him with the way he played."
Would Wilson's impressive play lead Petrino to insert the backup for a series or two in the Ole Miss game even with Mallett healthy?
"We won't change the way we play things," Petrino said. "We are going out to do the same things."
Petrino said it's been a good week of practice despite losing 65-43 to Auburn.
"We came out with a lot of energy Tuesday," he said. "It was a very good practice. Wednesday was a harder practice and we really tried to grind it out. I thought today the execution was very good and fast."
Defensively, does he worry about the mental attitude after giving up so many points. How is the confidence of the defense?
"We will find out Saturday," Petrino said. "I like the way they responded in practice this week. I like the way they utilized the scheme, the way we flew around. We have to get back to doing the things that allowed us to perform at a higher level in other games this year."
Special teams were a big focal point in practice this week after the Hogs gave up field position on both kickoffs and kickoff coverage teams.
"We worked hard on it, now we have to go out and show it," he said. "We gave more reps to kickoff return and coverage than we've done in a long time. I think we'll play better. We have covered the kickoffs, we just haven't tackled. We have to tackle better on the kickoffs."
Did the Hogs work more on tackling this week in practice since that was a problem on defense and kickoff coverage?
"We work hard on tackling every week, we just don't tackle to the ground," Petrino said. "We worked hard on our fundamentals this week just like we always do."
Ole Miss has improved since the early part of the season. What does Petrino see as different on video from the early Ole Miss games and those in conference play?
"Defensively, they have a good team," he said. "They are big and fast in the defensive front and they've covered better lately. Offensively, they've gotten better primarily because the quarterback has improved."
Does he see the excitement in his players to face former Arkansas coach Houston Nutt?
"We put our focus on ourselves," he said. "We do what we have to do to get ourselves ready to play. It's about getting better every day."