Razorback defensive coordinator Paul Haynes – speaking for the first time since last Friday's scrimmage – reflected back on the last go-around.
"There was some good and there was some bad," Haynes said. "The thing we concentrate the most on is no mental mistakes and effort. That is the two things coming out so far that we have got to continue to get better at.
"So the effort was good, but it wasn't great," Haynes added. "We will continue to work on those things."
"All we are trying to do is get better every day, don't make the same mistakes we did before," Haynes said. "We are still installing so there is still some learning. But it's effort and mental mistakes."
Haynes said Petrino was getting his ideas on practice down to the field.
"He was communicating with us on his thoughts," Haynes said. "We have ran practice a bunch of times. But he is up in the press box watching and he communicates with us after practice."
Haynes noted last week that he is still working through the mix at the linebacker and safety spots.
Tenarius Wright and Terrell Williams were praised or their effort at linebacker and Jerry Mitchell and Rohan Gaines at safety.
"We are kind of still working the kinks out of that," Haynes said. "Tank has continued to improve for us, Williams is coming along, Jerry Mitchell is getting better, Rohan Gaines. So there are some guys stepping up, doing some good things. They still got some things that have got to correct on, but there is improvement."
Haynes was asked about fullback Keiro Small working some at linebacker after practice.
"There are a group of guys like (defensive end) Chris Smith, Tank, Keiro that stay after practice and we will work linebacker drills with them," Haynes said. "But is is nothing that is written in stone. We are just continuing to work through just position-wise."
He also talked about the improvement the cornerbacks are making under assistant coach Bobby Allen.
"They did a good job," Haynes said. "Out there you have to be very good at technique, Our guys are working on Coach Allen on fundamentals and technique. Offenses are going to find a way to make those guys tackle so we are concentrating on tackling, but those guys are improving.
"Every day we have got to get those guys to understand what their role is at their position and not give up big plays at their position," Haynes said.
Tevin Mitchell, one of those cornerbacks, injured his hamstring before the scrimmage on Friday and has not been able to practice this week.
"I have been able to go through some drills, but not practice," Mitchell said. "I won't be able to scrimmage on Friday."
Kaseon Kellybrew was a walk on cornerback who made some plays last Friday.
"He did a good job in the scrimmage and was around the ball a lot," Haynes said. "He is a guy - that if he keeps improving – can find a way in there."
Arkansas has been standing up its defensive ends in practice and that's something that Haynes likes.
He likes the way his current defensive ends can do that here at Arkansas.
"It is something that we did (at Ohio State)," Haynes said. "A lot of times that guy can drop or he can rush. That gives offenses a little bit of a problem – not knowing if he is going to rush or is he going to drop from that two-point stance."
Haynes noted that the media and fans should not really pay that much attention to who is running first team or second team.
"That is really what the spring is for – to move guys around," Haynes said. "Really there is no ones and there are no twos. Just a group of those guys around…Hopefully coming out of spring we can find out what those guys do best and we can put them in their spots."