"We've said forever that who is hot gets the most," Petrino said when asked if Johnson could get more carries after some nice runs the last two weeks.
"But there is a good chance of that."
Petrino didn't want to talk about an issue of predictability in the offense as a problem, a subject brought up Monday by quarterback Tyler Wilson.
"That probably should have stayed between me and Tyler," Petrino said. "There are a couple of things, but I don't want to talk about it any more than that."
The Hogs were missing "one of their bullets" at practice Tuesday with tight end Chris Gragg out with a leg bruise sustained in the loss to Rutgers, the third straight for the Hogs. Gragg was listed as day-to-day by head coach John L. Smith on Monday. Petrino said that's still the situation for the big-play tight end.
"He's one of our bullets, one of our biggest studs," Petrino said, referencing the core philosophy of the system to "feed the studs." Petrino said he's still day-to-day and making improvement. But he said the team would not have been able to "count on him today."
The early portions of Tuesday's workout are open to the public. Offensive guard Tyler Deacon, out last week with a knee sprain, shared time with Luke Charpentier, the starter against Rutgers.
Safety Eric Bennett did some early drills, but quickly moved to a station with trainers. He was bothered by a hamstring injury in August camp. Cornerback Tevin Mitchel joined the team well into the workout, but was in shorts after continuing a cardio workout. He was not in pads and did not appear to practice.
Alan Turner was getting assignment checks with the first group at safety in the early portions of the workout. Will Hines continues to work at the first cornerback spot ahead of Darius Winston.
Petrino noted that Deacon and Charpentier split the work evenly with the first team and will continue to do that as the week progresses.
"Both may play," Petrino said. "Deacon is back and feeling better. We split those reps exactly and we will keep doing that."
Petrino said the record performance turned in by wide receiver Cobi Hamilton (10 catches, 303 yards) last week against Rutgers was just an extension of practice.
"He had a great week of practice," Petrino said. "I've always said that those that practice well, play well in the game. You saw that in Cobi last week."
Hamilton said his goal is to add to his record performance and get a victory.
"I want to keep doing it," he said. "I just want to keep practicing hard. You go out and compete every day. You just try to keep doing it better."
He said there was clearly a frustration that it didn't lead to a triumph.
"So we have to continue to improve in practice," he said. "We have to do the little things that we are coached to do in practice. We have to do the things that we are coached in a Tuesday practice and take that to a game. That's how you get a victory."
Will there be an us-against-the-world attitude when the Hogs travel to College Station for the first road game of the year?
"It's been like that for several months," Hamilton said. "We've had a lot of adversity. We have to stay together."
Hamilton has not been to College Station. The Texas product said he was not recruited by the Aggies. But he's long heard about the atmosphere of games at Kyle Field.
"I know it's a great atmosphere," he said. "I know it's loud. They have a great student section and we know they have a very good team. We know a lot of they have very good players. We've gone against them the last three years.
"We have had their number the last three years and we are familiar with them. We have to go down there and play Arkansas football."
Hamilton was told about complimentary remarks about him from Petrino.
"I know he thinks highly of me," he said. "Whatever he thinks, I'm behind him 100 percent. He knows I trust him and I know he trusts me."