Since the playoffs started, he's been performing unevenly, tallying a 3.31 GAA and a .883 SV%, which could be what forced Keefe to make the change. In game 4, Woll did a great job filling in for the Russian goalie. He blocked all the five shots that the Bruins fired at him.
Woll will need to bring his A-game as the Bruins will be hungry for victory. Last season, they blew a 3-1 lead against the Florida Panthers after winning the President's Trophy, something that probably still haunts them to this day.