The NFL have started a review into a late tackle made by Ndamukong Suh on Cleveland Browns quarterback Brandon Weeden at the weekend.
The Detroit Lions defensive tackle hit the 30-year-old after he had thrown a pass, leading with his helmet during the 31-17 win over the AFC North side.
The hit was not flagged by officials during the game, but the league has confirmed that it has started looking at the incident after a video was posted on NFL.com yesterday.
Suh has already been handed a $100,000 (£62,700) fine for a low block on Minnesota Vikings center John Sullivan earlier this season.
