OTTAWA, ON - APRIL 15: Linesman Derek Nansen #70 separates Clarke MacArthur #16 of the Ottawa Senators and Joe Morrow #45 of the Boston Bruins in the second period in Game Two of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at Canadian Tire Centre on April 15, 2017 in Ottawa, Ontario, Canada. (Photo by Jana Chytilova/Freestyle Photography/Getty Images)

OTTAWA, ON - APRIL 15: Linesman Derek Nansen #70 separates Clarke MacArthur #16 of the Ottawa Senators and Joe Morrow #45 of the Boston Bruins in the second period in Game Two of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at Canadian Tire Centre on April 15, 2017 in Ottawa, Ontario, Canada.  (Photo by Jana Chytilova/Freestyle Photography/Getty Images)