Mallett addressed the media after Tuesday's practice, noting he was better Sunday and didn't feel any symptoms from the concussion the last two days.
"There was a stoppage in the game right after it happened and he confirmed what I was thinking," McGee said. "The doctors took it from there."
Mallett said the problems happened when the back of his helmet hit the ground when he was being pressured on the play before a touchdown. He also denied that he was having any problems with his left shoulder, one of the rumors that has persisted for the last two weeks.
"My left arm is fine," Mallett said. "That's just speculation."
Mallett said it isn't the first concussion.
"I had something similar in high school," he said. "It was my senior year. You get a woozy feeling. I wanted to go back in (against Auburn), but the coaches and trainers wouldn't let me. I bumped the back of my head pretty good on the ground."
McGee said Tuesday's practice was solid. He said the Hogs responded with "good energy, good spirits and with a great attitude. I've said all along that this team has character and leadership. We've had two setbacks, but they continue to come to practice with a good attitude and a lot of enthusiasm."
Mallett said it was easy to come to practice. Was he surprised with the way the Hogs practiced following the loss to Auburn.
"I don't think it's hard at all," he said. "After a loss, it's not hard to get ready to play. You feel embarrassed for the school and the team. We didn't finish that game."
Mallett was asked if he thinks the Hogs have the same incentive to play Ole Miss that perhaps Ole Miss and former Arkansas coach Houston Nutt hold.
"I don't know how Ole Miss is preparing," he said. "I don't know what he does. But we are going to be ready for another opportunity to play."
Tight end D. J. Williams said the Hogs have plenty of motivation after the way they played in some areas against Auburn. But it won't be about trying to earn revenge against Nutt.
"For me, it's just another game," he said. "That's not the motivation I feel for this game. I do have plenty to get me ready. I saw some areas of my play that weren't right from this last game that I need to fix. I want to correct those things."
McGee, Mallett and Williams all praised the work of backup quarterback Tyler Wilson in relief of Mallett against Auburn.
McGee said he wasn't surprised because he's seen that kind of play in practice at times.
"I guess it was different for me because I see him every day, in late night meetings," McGee said. "I'm not surprised that Tyler did well."
McGee said Wilson got encouragement from teammates, including Mallett.
"Ryan came to us before we went back out for the second half and told Tyler, 'No matter what, just battle for four quarters,' because that's the message we talk about," McGee said. "Tyler understood that."
Mallett said, "Tyler did a great job. Obviously, you don't ever want to come out of a game, but I knew that Tyler would do great. You know if something happens, we all have confidence in Tyler."
Williams said there wasn't a need to change anything at halftime.
"To be honest, I didn't even realize that Ryan was hurt in the first half," he said. "We were in the huddle and Tyler comes in. We know he has character and ability and we also know he's a gamer. So we just kept doing what we were doing. We didn't even change a thing."
Williams said both looked good in practice Tuesday. He said there wasn't any focus on who would play against Ole Miss because both are full speed.
"Ryan was his same old self, no different," Williams said. "You know both are able to do well."
The focus, instead, is on the Ole Miss defense.
"They are very good," Williams said. "Very fast, very physical. They play with a lot of energy. You watch the cut ups of play after play and you see all of their players finish around the ball. You see that on play after play."