FAYETTEVILLE - After limited practice Friday, Arkansas senior offensive guard Grant Cook stepped back into his first-team spot Saturday for the first time since spraining an ankle last week.

Backup center Tyler Deacon, with previous guard experience, and junior squadron David Hurd took the first-team snaps Cook didn't take Saturday while incumbent starter Alvin Bailey played all first-team plays at the other guard. The Razorbacks have a practice Sunday afternoon that's closed to the public and media.

Head coach Bobby Petrino and offensive line coach Chris Klenakis continue auditioning offensive tackles.

Mitch Smothers, the true freshman from Springdale High, played ahead of junior college transfer Jason Peacock and joined senior Grant Freeman as Saturday's tackles on the offensive first team.

Sophomore Eric Bennett, who closed spring drills ahead of senior Elton Ford at first-team safety but started the preseason behind Ford, did the bulk of the first-team work in Thursday's scrimmage and continues doing so.

Sophomore defensive tackle Byran Jones, limping a bit, did some drills in both sessions but finished both on the sidelines doing the boxing drills with a trainer holding pads that injured players do to keep in condition. Junior D.D. Jones worked at Byran Jones' spot.

Junior tight end Chris Gragg caught many passes Saturday morning, the day's only workout in full pads.

"Stepping up" was Saturday's theme in the wake of All-SEC running back Knile Davis fracturing an ankle during Thursday night's scrimmage.

Davis, on the preseason Doak Walker, Maxwell and Walter Camp watch lists, will rehab from Thursday night's surgery all season and redshirt, restoring his junior eligibility in 2012.

Juniors Dennis Johnson, hardshipped last year because of a ruptured bowel two games into the season, and Ronnie Wingo know they must "step up" now.

"Me and Wingo have talked about how we've got to step this up," Johnson said. "We've got to teach these freshmen (Kody Walker and Kelvin Fisher) how to run the rock and do what we do. We've just got to step up."

Senior wide receiver Greg Childs of Warren didn't practice Saturday afternoon. Childs may have had a family obligation as he practiced without problems in the Saturday morning practice attended by his father.