David Krejci scored his third goal of the night at 13:06 of overtime Wednesday, giving the Boston Bruins a 4-3 win over the Toronto Maple Leafs and a 3-1 lead in their playoff series.
Krejci beat James Reimer with a shot from the faceoff circle after coming down the left wing.
The Bruins are 15-2 when leading a best-of-seven series 3-1. And Toronto is 2-12-1 in its last 15 games in Boston.
Patrice Bergeron added a goal for Boston, with captain Zdeno Chara collecting four assists.
Joffrey Lupul, Cody Franson and Clarke MacArthur scored for Toronto.
Goalies Tuukka Rask and Reimer were both busy in an end-to-end overtime, with Toronto's Matt Frattin hitting Rask's goalpost.