Mitch Marner scored his second goal with 51.3 seconds left in overtime to lead the visiting Toronto Maple Leafs to a come-from-behind, 5-4 win over the Boston Bruins on Tuesday night.

Marner picked up a long Auston Matthews feed and deked Boston goaltender Jeremy Swayman to slide home the deciding goal, which finished Toronto's climb out of 3-0 and 4-3 deficits en route to its third straight victory.

The Bruins' three-goal lead was erased after a two-goal Toronto run to start the third, but David Pastrnak carried the puck out of the left corner and scored a quick release under the crossbar for a Bruins go-ahead tally with 9:27 left in regulation.

Toronto forced overtime, however, as Pontus Holmberg scored an extra-attacker goal with 46 seconds left in regulation, popping a loose puck out of a net-mouth scramble.

Morgan Rielly led the Leafs with a goal and three assists, Nick Robertson had a goal and a helper, and Oliver Ekman-Larsson had two helpers.

Toronto's Anthony Stolarz stopped 32 shots.

Pastrnak posted two goals and an assist to extend his NHL season-long point streak to 15 games for Boston, which is on a four-game skid (0-2-2).

Brad Marchand added a goal and an assist, Morgan Geekie also scored, and Mason Lohrei had two helpers. Swayman made 24 saves.

The Bruins led from the first shift, as Lohrei sent a perfect stretch pass down the middle of the ice to Pastrnak for a break-in goal only 29 seconds into the game.

Marchand made it 2-0 when he buried the carom of a Pastrnak shot off Toronto defender Jake McCabe on the power play at 13:59 of the first. Less than a minute earlier, Matthews clanked the left post on a short-handed odd-man rush.

Boston nearly extended its lead to 3-0 to end the first, but Stolarz denied Geekie's point-blank chance from low on the right.

Geekie needed only six seconds of a second-period power play to net the Bruins' third goal. Scoring exactly halfway through the game, he one-timed an Elias Lindholm rebound from the left circle.

The Leafs got on the scoreboard with 6:08 left in the second. Rielly slotted Matthew Knies' cross-ice pass over Swayman's glove from the top of the left circle.

Marner brought Toronto within 3-2 only 59 seconds into the third, stickhandling between the circles before firing a wrist shot from inside the left dot.

At 6:39, Robertson tied the game at 3-3 with a transition wrister that Rielly orchestrated with a head feed through the Boston defense.

Toronto defenseman Chris Tanev (upper-body) played only two shifts in the opening period.

--Field Level Media