LEXINGTON, Ky. -- Everything changed in two series for Kentucky.

The result was the Wildcats tying the school’s largest fourth-quarter comeback in school history.

Mike Hartline’s 21-yard pass to Randall Cobb with 2 minutes, 21 seconds remaining capped Kentucky’s improbable 21-20 win over Arkansas on Saturday night in Commonwealth Stadium.

The Razorbacks appeared to have the game well in hand, ahead 20-7, after Ramon Broadway’s interception of a Mike Hartline pass with 4:56 remaining.

From there, however, it was all Kentucky — starting with Arkansas’ De’Anthony Curtis fumbling on the Razorbacks first play after Broadway’s interception.

The Wildcats followed Broadway’s interception with a pair of two-play touchdown drives, both finished off by Hartline passes to Cobb. The first came when Hartline, who had struggled for much of the game, found Cobb on a corner route to the right side that pulled Kentucky to within 20-14.

Following an Arkansas punt, Hartline put the Wildcats ahead for good when he found Cobb over the middle for the game-winning touchdown.

“When it did turn, there was no question we had the momentum,” Kentucky coach Rich Brooks said. “And our players believed they could do it.

“They actually believed they could do it.”

Prior to the final two drives, Kentucky had mustered only one big play on offense — Alfonso Smith’s 71-yard touchdown reception in the third quarter. Beyond that, the Wildcats had done very little on offense, gaining 259 yards through three quarters but having only seven points to show for it thanks to four turnovers.

“Obviously, this didn’t go to script,” Brooks said. “We moved the ball well early. We seemed to do some good things, but them we seemed to do something to undo it in the first half.

“We seemed to find a way to not come out of (drives) with points.”

Hartline, who threw for only 152 yards in a loss to South Carolina last week, wasn’t much better for the Wildcats before the final two drives. At that point, the sophomore was just 13 of 28 passing for 163 yards and a pair of interceptions.

“Mike is a very confident guy, but I’m sure his confidence has to be shaken recently,” Brooks said. “It was probably shaken in this game early.”

On the final two drives, however, Hartline was 4 of 4 passing for 76 yards and the two touchdowns — finishing the game 17 of 32 passing for 239 yards.

“We’re not going to quit,” Hartline said. “Even though we did not have much success in the first half or through three quarters, there’s no quit in this offense, no matter how bad we might seem like we’re doing.”

Cobb, who also saw action at quarterback in the first half, wore No. 12 in the game. The number had been that of receiver Dicky Lyons Jr., Kentucky’s top playmaker who tore ligaments in his left knee a week ago, ending his season.

“Honestly, I don’t believe we played good enough to win,” Cobb said. “Besides those last two drives, we didn’t get anything done.”