New York Islanders defenseman Johnny Boychuk (55) and Vegas Golden Knights center Jonathan Marchessault (81) fight for the puck during the first period of an NHL hockey game at T-Mobile Arena in L …

New York Islanders defenseman Johnny Boychuk (55) and Vegas Golden Knights center Jonathan Marchessault (81) fight for the puck during the first period of an NHL hockey game at T-Mobile Arena in Las Vegas, Thursday, Dec. 20, 2018. Caroline Brehman/Las Vegas Review-Journal