OTTAWA, ON - MAY 19: Head coach Mike Sullivan of the Pittsburgh Penguins reacts late in the third period against the Ottawa Senators in Game Four of the Eastern Conference Final during the 2017 NHL Stanley Cup Playoffs at Canadian Tire Centre on May 19, 2017 in Ottawa, Ontario, Canada. The Pittsburgh Penguins defeated the Ottawa Senators 3-2. (Photo by Minas Panagiotakis/Getty Images)
