FAYETTEVILLE, Ark. (AP) -The NCAA ruled Friday that transfer quarterback Ryan Mallett must sit out a year before playing for Arkansas.

The Razorbacks had asked the NCAA to waive the requirement that Mallett sit out a year. Mallett transferred from Michigan after coach Lloyd Carr retired and was replaced by Rich Rodriguez.

Mallett can practice with the team, but not play during the 2008 season. He practiced with Arkansas this spring, but missed many practices with a thumb injury.

``For now, I will focus on finishing up the semester academically, rehabilitating my (thumb) injury and getting prepared for preseason camp,'' Mallett said. ``I look forward to taking the field for the Razorbacks when I have that opportunity.''

The 6-foot-7 quarterback played in 11 games for the Wolverines last year. He has three years of eligibility remaining.

Mallett was 61-of-141 for 892 yards with seven touchdown passes and five interceptions last season at Michigan as Chad Henne's backup.

The NCAA decision eliminated one competitor for returning starter Casey Dick, who went 33-of-49 for 404 yards in last week's spring game.