As quarterback AJ McCarron and the Alabama Crimson Tide roll through the beginning of football season, he has one less cheerleader in the stands: Breaking Celebrity News has exclusively learned that McCarron and his gorgeous model girlfriend, Katherine Webb, have ended their relationship.

"Yes they've broken up," Katherine's mother, Leslie Webb, confirmed to Breaking Celebrity News. "Katherine's just trying to stay real busy."

The couple had been practically a real-life Barbie and Ken for Alabama fans ever since announcers pointed out Webb in the crowd last season.

She soon shot to fame with modeling deals and a stint on Splash, the high-diving reality show.

But all that traveling put new tensions on their relationship.

While Webb was out of town at the Spike TV Awards in June, McCarron spent the night with blonde lingerie model Margaret Wood -- as Breaking Celebrity News exclusively reported.