Texas A&M quarterback Jerrod Johnson (1) breaks away from Texas cornerback Curtis Brown (3) during the second quarter of an NCAA college football game Thursday, Nov. 26, 2009, in College Station, Texas.

College Station, Texas ? Colt McCoy threw four touchdown passes and dashed 65 yards for another score, and No. 3 Texas overcame a huge game by Texas A&M quarterback Jerrod Johnson to wrap up an undefeated regular season with a 49-39 win over the Aggies on Thursday night.

In a splendid all-around performance that could boost his Heisman Trophy chances, McCoy racked up 479 yards of total offense for the Longhorns (12-0, 8-0 Big 12), who have only next week’s conference championship game against Nebraska standing between them and the BCS title game.

“We were fortunate to come out on top,” McCoy said. “I’m so thankful to get a win.”

For a while, it seemed as though Johnson would rally the Aggies (6-6, 3-5) to a gigantic upset, shattering McCoy’s Heisman hopes and opening the door for TCU and Cincinnati to vault into the national championship picture.

Jeff Fuller caught three touchdown passes from Johnson, the last with 7:10 left to cut Texas’ lead to 42-39. But Marquise Goodwin returned the ensuing kickoff 95 yards for a touchdown, and the Longhorns could finally breathe easy after A&M’s Randy Bullock missed a 23-yard field goal try with 3:05 remaining.

“It was tough. We expected that coming in,” McCoy said.

The senior star completed 24 of 40 passes for 304 yards and ran for a career-high 175 yards on 18 carries. But Johnson was just as spectacular, going 26 of 33 for 342 yards with four TD passes against the Longhorns’ third-ranked defense. He added 97 yards on 14 carries for an all-purpose total of 439 yards.

“He’s a tremendous quarterback,” McCoy said.

Following their Texas shootout, the two QBs embraced at midfield after the game — and Johnson’s nationally televised showcase just might put him in the conversation for next year’s Heisman.