AUSTIN, Texas -- Texas offensive coordinator Greg Davis has resigned and two other assistant coaches are retiring after the Longhorns' first losing season since 1997.

Davis, who has been with coach Mack Brown for 13 seasons at Texas, had been under fire all season as Texas finished 5-7 and didn't qualify for a bowl.

Under Greg Davis, Texas had some of the most prolific offenses in program history that helped in winning two Big 12 championships and the 2005 BCS national title. Chris Williams/Icon SMI

It was Brown's first losing season since 1989. The Longhorns finished last in the Big 12 South and went 2-5 at home, losing four in a row at one point.

Offensive line coach Mac McWhorter and defensive line coach and special teams coordinator Mike Tolleson are retiring.

"These are three special people who have given a lot of themselves and their families to the University of Texas and its football program," Brown said in a statement.

"They are not only great coaches, but men who handled themselves with tremendous integrity, class and dignity on and off the field during their time here. I want to say thank you and wish them well because they will be missed," Brown said.

Texas spokesman John Bianco said Monday that Brown was not likely to announce replacements until after the bowl season.

Brown and Davis have been a coaching team dating back to the 1980s at Tulane and at North Carolina in the '90s before Brown brought Davis with him to Texas before the 1998 season.

"I've had a great 13 years here and enjoyed every minute of it," Davis said.

Under Davis, the Longhorns had some of the most prolific offenses in program history with a Heisman Trophy winner (Ricky Williams in 1998), two more Heisman finalists (quarterbacks Vince Young and Colt McCoy), two Big 12 championships and the 2005 BCS national championship. Texas also played for the 2009 national championship and won 10 games every year from 2001-2009.

But the Longhorns dropped off dramatically in 2010 and Brown's desire to revamp Texas' spread passing offense to include a power running game never materialized on the field.