Petrino, who also coaches the wide receivers, was asked about the injuries at that position - notably Lucas Miller and London Crawford. Both have suffered broken collarbones this year and both have had surgery to repair it.
Petrino said Miller, who was injured three weeks ago, would not return for Arkansas' Sept. 19 date with Georgia - the earliest date the fifth-year senior was expected to return.
"The best case scenario would be the Alabama game and the worst-case scenario would be the next week (against Texas A&M)," Petrino said.
Crawford fractured his right collarbone in the third quarter Saturday and underwent surgery Monday. He is expected to miss 4 to 6 weeks with the recovery.
Asked if the senior Crawford might redshirt, Petrino said, "That's a possibility. It's something we've talked about."
On a more positive note, for the first time in the coaching staff's short tenure at Arkansas, the Razorbacks didn't drop any passes in the 48-10 win over Missouri State.
"They played good," Petrino said after 13 different receivers caught passes. "We didn't have any drops. They had some good touchdown blocks and played hard. One thing that we have really been working on is getting off and arm drive, and playing fast, and I thought they did a good job of that. They had a good game."
The offensive coordinator said the coaches were happy with the team's Thursday practice.
"I thought that the guys came out with good energy, they flew around and had a good attitude," Petrino said. "I think that we got better today."
On Arkansas going for it three times on fourth down in the opener against Missouri State, Petrino said, "When you have a head coach like we have, we're going to go for it on fourth down. As an offensive coordinator you want to go for it every time and our coach allows us to do that."
Petrino said the team had a good week of preparation for Georgia. The Bulldogs are 0-1 after a 24-10 loss to Oklahoma State last week and will host conference foe South Carolina this weekend before traveling to Fayetteville.
"We worked hard, we took a couple of formations today of what we want to do against Georgia and I think the kids understand it," Petrino said. "We got to watch a lot of tape of them, so it has definitely put us ahead in knowing what they do, so it will be interesting to see how they play against South Carolina. We have tried to make it a big positive and the kids have worked hard and I think improved during the week."
Asked what concerned him most about the Bulldogs' defense, Petrino said it was the front four.
"Their two defensive tackles are big and strong," Petrino said. "They don't get moved around much, they really played pretty good against Oklahoma State...most of (Oklahoma State's) points came off good field position. They are a good defense, they fly around and play hard and they are big inside. They do a good job anchoring inside with their defensive tackles."