Referee Kevin Pollock breaks up the pushing match between Pittsburgh Penguins center Jake Guentzel (59) and Washington Capitals center Evgeny Kuznetsov (92) in the third period of the Capitals 4-3 win of Game Three in the Second Round of the Eastern Conference 2018 NHL Stanley Cup Playoffs at PPG Paints Arena in Pittsburgh on May 1, 2018. Photo by Archie Carpenter/UPI