The NFL is looking into an arm wrestling contest at the MGM Grand casino in Las Vegas that reportedly featured more than 30 current and former players, including Pittsburgh Steelers linebacker James Harrison and retired running back Marshawn Lynch.
NFL spokesman Brian McCarthy told ESPN on Sunday that the league just became aware of The Pro Football Arm Wrestling Championship and will be looking into it further.
Participating players could be in violation of the league's gambling policy and may face fines. League personnel are prohibited from making promotional appearances at casinos or other gambling-related establishments.
"Had we been asked in advance if this was acceptable, we would have indicated that it was in direct violation of the gambling policy," Joe Lockhart, NFL vice president of communications, told USA Today Sports, which first reported the league's concern over the event. "No one sought pre-approval."