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.

Yet the mood around the Leafs dressing room sunk a little lower than expected following a 5-4 win over the Boston Bruins as Chris Tanev walked out with his right arm in a sling. The Leafs’ top defenceman took a hit from Bruins centre Pavel Zacha in his second shift of the game and did not return.

Toronto Maple Leafs (35-20-2, in the Atlantic Division) vs. Boston Bruins (27-24-7, in the Atlantic Division)

The Boston Bruins came out flying against the Toronto Maple Leafs, as they had a 3-0 lead at the halfway point of the second period. However, like many other times this season, the Original Six club did not leave the game they had control of with two points.

Marner deked to his forehand on a breakaway at 4:07 of the extra period, fooling goaltender Jeremy Swayman. Seconds earlier, Leafs goalie Anthony Stolarz stopped Mason Lohrei before Auston Matthews sent Marner in alone.

Mitch Marner scored with 51 seconds left in overtime the Maple Leafs a 5-4 win over the Bruins Tuesday night at TD Garden. It was one of the most demoralizing losses of the season for the reeling Bruins, who blew leads of 3-0 and 4-3 as Toronto scored three times in the third period.