NFL Draft prospect Bradley Roby has been arrested and charged with operating a vehicle impaired, according to reports.

The former Ohio State Buckeyes cornerback was allegedly found passed out behind the wheel of a car on April 20, and police officers were initially unable to gain his attention.

The report states that the officers then opened the door and noticed a smell of alcohol, before giving Roby a field sobriety test that he failed.

The 21-year-old was also suspended for the first game of last season after allegedly being involved in a bar fight, although criminal charges were dismissed on that occasion.

Roby has been projected as a first-round pick in next month's Draft and is widely regarded to be amongst the best cornerbacks available.