MURRAY, Ky. — Murray State quarterback Jeff Ehrhardt was charged with pushing a campus police officer and taking his ticket book. The athletic director called this "a prank gone bad."

Ehrhardt, a 20-year-old sophomore, was arrested Wednesday and charged with second-degree robbery. He surrendered to the campus public safety office and returned the ticket book after a witness identified him.

Ehrhardt is to appear in court April 29. The charge carries a potential prison term of up to 10 years. Ehrhardt could not be reached for comment.

According to the police report, Ehrhardt said he was bet $20 he wouldn't take such action against the officer.

Athletic director Allen Ward said he already punished the player and will wait to see if further action is required. Coach Matt Griffin is also imposing discipline, including limits on Ehrhardt's time on the field.

Ehrhardt won the 2007 Ohio Valley Conference Freshman of the Year award, leading the conference with 2,567 yards passing and 21 touchdowns. He rushed for 375 yards and five touchdowns.