Referee Craig Wrolstad’s crew didn’t deem it a penalty at the time, but the NFL has stepped in and decided that Cowboys linebacker Damone Clark used unnecessary roughness in bringing down Bills running back James Cook during the Dallas loss last Sunday.

Clark has incurred a fine of $5,170 for the play.

The incident came just as the first quarter ended. On the second play following Sam Williams’s roughing the punter penalty and down 7-0, the Cowboys defense found themselves chasing Cook after a short pass turned into a chain-moving scamper.

Markquese Bell had the first crack at Cook but missed the tackle. Twenty-four yards downfield, Stephon Gilmore and Clark finally pushed him out of bounds. Replays showed that, in the process of tossing him to the ground, Clark gripped Cook’s helmet opening under the ear hole.

Had officials seen it live, it almost certainly would have brought a 15-yard personal foul penalty and would have been the second committed by the Cowboys on that drive. Buffalo ended the possession with a touchdown anyway, extending their lead to 14-0 en route to a dominant 31-10 victory.

Two Bills defenders also picked up hefty fines during the Week 15 meeting. Safety Taylor Rapp will be docked $21,855 for the first-quarter late hit on Dak Prescott that prompted guard Zack Martin to play enforcer, and linebacker Tyrel Dodson’s head-to-head shot on Prescott in the second quarter will cost him $11,167. Both hits were deemed unnecessary roughness; both were called as penalties during the game (although Rapp’s was offset by Martin’s retaliation).