GAINESVILLE  - Florida quarterback Will Grier has been suspended indefinitely for violating the NCAA's policy on banned performance-enhancing drugs.

Grier says he took an over-the-counter supplement and Florida plans to appeal the suspension, which is expected to last one year. Coach Jim McElwain says Grier made an honest mistake that could have been prevented by talking to the team's medical staff. He says Florida plans to appeal the NCAA's decision.

Grier was emotional while apologizing for his mistake when he spoke to reporters Monday.

Treon Harris will take over at quarterback when the eighth-ranked Gators travel to take on No. 6 LSU Saturday in a battle of unbeatens.

Grier is the first Florida quarterback to pass for more than 200 yards in three consecutive games since Tim Tebow in 2009. Grier has completed 65.8 percent of his passes for 1,204 yards, with 10 touchdowns and three interceptions.