WYOMING, Mich. (AP) -Michigan running back Kevin Grady pleaded not guilty to a misdemeanor drunken-driving charge on Wednesday.

Grady faces up to 93 days in jail if convicted of operating while intoxicated. Jury selection will begin Aug. 14.

Wyoming police arrested Grady on July 2 and said his blood-alcohol level registered about three-and-a-half times the state's legal limit.

The court said Grady has not retained a lawyer. He could not be reached for comment because a home phone number could not be found. Michigan football coach Rich Rodriguez has said the matter will be handled internally.

A knee injury sidelined Grady all last season. The former East Grand Rapids High standout holds the state prep career records for yards rushing and touchdowns.