Green, who transferred to Arkansas from Southern California in the offseason, is hoping the NCAA will permit him to play this season. A published report last week said Green would be ruled eligible, but Arkansas refuted it by saying the school had heard nothing on his status.
"We don't know anything on Broderick Green yet," Petrino added Wednesday. "I wish I did know. And I'm not exactly sure when that answer is going to come in. It's got to come in before we get started, though. I hope that."
Petrino said the Razorbacks will continue to prepare as if Green will be eligible this season.
Arkansas is hoping the transfer will be part of a deep backfield that also includes Michael Smith, Dennis Johnson, De'Anthony Curtis, Knile Davis and incoming freshman Ronnie Wingo. If he won't be eligible to play until 2010, they'll move forward with the other backs.
"The best thing to do is prepare like he is going to be here," Petrino said. "So you get your personnel groups, you get everything set as if he's going to be here.
"Then if he's not, we adjust like it's an injury and the next guy just steps in and goes."
It's still not clear whether defensive tackle Lavunce Askew will be permitted to practice when drills begin.
But Petrino said Askew, who was suspended indefinitely after being arrested for stealing a laptop, is back with the team after the felony charge was dropped last week.
"I took a month and didn't allow him to do anything with the football team at all," Petrino said. "He lifted and he ran on his own. I allowed him this month to rejoin the workouts. ... He just needs to learn how to do things right. If he does that, he'll be with us when we get started."
Arkansas also will have most of its injured players ready when practice begins.
Petrino said Smith (hamstring), wide reciever Lucas Miller (knee) and safety Elton Ford (neck) will participate in drills. Petrino said the Hogs might take precautions with Smith and Miller when they begin two-a-day practices.
"When we get to two-a-days, a day we're practicing twice, they might only practice once that day," he said.
In addition, Davis (broken ankle) returned to full speed this week and is slightly ahead of schedule. But running back Brandon Barnett (ankle) will need more time before he has completely recovered from his injury.
Freshman cornerback Darius Winston was cleared earlier this week by the NCAA. Now that he's academically eligible, Petrino said the state's top prospect in the 2009 recruiting class will have a chance to help immediately.
"We're excited he did get cleared," Petrino said. "In the secondary we feel like we've got some guys that can come in and compete and fight for playing time or add depth. Darius is certainly one of those guys.
"There's a lot of positives to him getting cleared."
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