Odell Beckham Jr. wasn't the only one throwing punches Sunday in Buffalo.

An unidentified Bills player who wasn't even in uniform took a swing at Giants defensive lineman Cullen Jenkins in the fourth quarter after a play ended in front of the Bills' bench.

"I don't even know who it was," Jenkins told Newsday on Wednesday. "Who does that?"

It's unclear.

Jenkins was credited with a sack on the play, thumping quarterback Tyrod Taylor out of bounds for a loss of 2 yards. After that hit along the sideline, Bills coach Rex Ryan had words for Jenkins and the two were briefly face-to-face. Then other players separated them. It was not much more than is seen on any routine play along the sideline.

But then a player in a Bills sweatsuit approaches and clearly takes a swing at Jenkins.

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"I saw the film and he reached over his teammate's shoulder, he was hiding behind his teammate, reached over his shoulder," Jenkins said. "I was looking the opposite way so I didn't even know it happened until after the game when I saw the video. I was like 'Wow.'"

There was no penalty on the play. The NFL does not normally confirm any fines on such plays until later in the week.

"You get people like that, they get around their group and they think they're tough," Jenkins said. "Anybody can be tough when they're hiding behind their whole team."