Montreal Canadiens substitute coach Luke Richardson stands behind the team bench during the first period of Game 3 of the team's NHL hockey semifinal series against the Vegas Golden Knights, Friday, June 18, 2021, in Montreal. (Paul Chiasson/The Canadian Press via AP)

FILE - Montreal Canadiens coach Dominique Ducharme keeps an eye on the action, as do Paul Byron (41) and Phillip Danault (24) during the the team's NHL hockey game against the Ottawa Senators in Montreal, in this Tuesday, March 2, 2021, file photo. The four coaches left in the NHL playoffs have connections to each other, but they all took different paths to get to this point. (Ryan Remiorz/The Canadian Press via AP)