Auburn's Rudi Johnson made some big mistakes, but his defense made up for them. (AP)

Auburn (7-2, 4-2 Southeastern Conference) also got big plays, big days and big mistakes from quarterback Ben Leard and tailback Rudi Johnson. Leard was 19-of-30 for 240 yards and a touchdown, but was picked off twice.

Johnson rushed 29 times for 114 yards and a TD, but his fumble late in the fourth was negated only by Rodney Crayton's interception on the next play.

"We are just trying so hard to make a play," Auburn coach Tommy Tuberville said. "It seems like sometimes at the end of the game when you have to make a play, the ball gets a little smaller and bad things happen."

They certainly happened to the Razorbacks (4-3, 1-3), who have lost three of four games and eight straight SEC road contests.

Clark entered after Robby Hampton went down with a sprained right shoulder early in the fourth quarter on a failed fourth-down play. Hampton was 19-of-34 for 163 yards.

"There was no doubt if Hampton plays we win," Arkansas coach Houston Nutt said. "I think Auburn was very fortunate today."

Clark, who sprained an ankle in his debut against South Carolina two weeks ago, started off well.

His 41-yard pass to Fred Talley set up a first-and-goal from the Auburn 9. A short run and two incompletions forced the Razorbacks to settle for Brennan O'Donohoe's 24-yard field goal with 4:20 left. Clark finished 1-of-7.

The Tigers went three-and-out, but three plays later, Clark's pass was picked off by Stanford Simmons.

Johnson's fumble gave them the ball right back with 1:43 left at the Auburn 34. The next play was an interception by Crayton.

"That goes to show you've got to believe in your teammates," Johnson said, "and they came through."

Unable to run the clock out, Auburn took a safety on fourth down with three seconds left.

Arkansas couldn't return the free kick to midfield despite a handoff and lateral, and the clock ran out.

"I don't want them to put their heads down," Nutt said. "I want them to look straight ahead."

Talley, starting for the first time at tailback, rushed for 161 yards and a TD on 26 carries. He entered the game with 160 yards on the season.

Robinson's acrobatic TD, on a screen pass that was ruled a lateral, polished off a 93-yard drive with 1:39 left in the third quarter.

The teams both scored a pair of TDs in the second quarter.

Leard hit Tim Carter with a 37-yard scoring pass on fourth-and-2. Carter stepped out of a defensive back's grasp and spun away from another would-be tackler downfield, diving into the end zone.

"A couple of defensive backs missed tackles," Carter said. "I could see the end zone and there was no way that I wasn't going to get in there."

On the next play, Talley busted up the middle for an 80-yard TD run, the Razorbacks' longest of the season. Talley was the third tailback Nutt has turned to since Cedric Cobbs went down with a season-ending injury.

Johnson would answer late in the quarter for Auburn. His spinning, tackle-breaking 23-yarder capped a nine-play, 95-yard drive with 2:26 left.

The Razorbacks tied it up with Brandon Holmes' 3-yard TD run with 29 seconds left.

The Tigers, whose first open date is next week, improved to 6-0 at home.