Montreal Canadiens replacement coach Luke Richardson gives instructions during a break in play against the Vegas Golden Knights during the second period of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Paul Chiasson/The Canadian Press via AP)

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)

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