Tuukka Rask allowed four goals on 16 shots before being replaced.
Patrice Bergeron earned his 500th point as Boston beat Toronto.
The story of the game was the sloppy play of the Bruins’ young defensemen, who on some level all contributed to each of the Leafs’ four goals.
The Toronto Maple Leafs beat the Boston Bruins 4-3 on Thursday night.
Tyler Bozak scored twice, Phil Kessel had three assists and the Toronto Maple Leafs held off the Boston Bruins 4-3 on Tuesday night.
Adam Jones goes over the best and worst of the Bruins 4-3 loss to the Maple Leafs.
Carl Soderberg notches a goal and an assist to help the Bruins get past the Maple Leafs on Sunday.
Patrice Bergeron scored a power-play goal early in the third period and Tuukka Rask stopped 33 shots, lifting the Bruins to a 3-1 win over Toronto on Saturday night in the teams’ first meeting since their playoff series last spring.
The Boston Bruins stormed back from a 4-2 deficit in the third period Monday night to win Game 7 of their playoff series against the Toronto Maple Leafs in overtime, 5-4.
Game 6 is Sunday in Toronto, with the decisive seventh game back in Boston on Monday, if necessary.