Sherrod Harris was able to walk on his own from the team bus into the Moncreif-Neuhaus athletic facility following Monday's workout.
"I'm disappointed that I'm going to have to miss some practice time because of the injury but I'm still going to be out at practice every day preparing for the season with my teammates and coaches," Harris said in an official release. "I'll work with the trainers and doctors to get my knee back to 100 percent and return to the field as soon as possible."
Quarterbacks are not allowed to be hit during Longhorn practices but Harris' injury was sustained when an offensive lineman accidentally rolled on top of Harris' left knee, according to a source close to the situation.
Starting QB Colt McCoy gets approximately half of the reps during preseason workouts while Harris and Chiles had been splitting the remainder of the snaps prior to Sunday's injury. Brown reiterated there had been no talk of Chiles' redshirting this season or moving to WR.
"We've always said that if a guy can play in the Two-Deep or on a kicking team then we would not consider redshirting," Brown said. "It's much more important to give this team the best chance to win than to redshirt a guy."
Chiles was originally recruited as a WR/ATH but has not backed off from his preference to play QB.
"John has done a really good job the last three or four days," Brown continued. "He's decided that he wants to play (this year), and he wants to play quarterback. So, he's been competing hard for that job. He has not mentioned redshirting to us, and he has not mentioned playing both positions since the start of two-a-days."
Chiles, of course, enrolled early to participate in spring football. He's added some muscle during the off-season and weighs-in at 210 pounds, Brown estimates.
"He's a very powerful runner and he's got a great arm," Brown said. "We saw what (offensive coordinator) Greg Davis was able to do with Vince (Young) over time. We expect the same thing that (Davis) will be able to do to help John. He's working really hard, and I think he'll be fun to watch."
Coaches emphasized inside-running drills Monday afternoon, the heat index exceeding 110 degrees.
"Today was all about hitting, the inside drill, running the football and stopping the run," Brown said. "I was really pleased walking out of there today with how physical they were."
Tuesday will be the second true two-a-day session for the Horns while Wednesday will mark the first of three scrimmages of the preseason.