OTTAWA, Ontario - Brad Marchand scored at 1:48 of overtime and the Boston Bruins beat the Ottawa Senators 3-2 on Thursday night. 

David Pastrnak and Trent Frederic also scored for the Atlantic Division- and Eastern Conference-leading Bruins. Jeremy Swayman stopped 35 shots. 

Thomas Chabot and Vladimir Tarasenko scored for the Senators. Joonas Korpisalo made 20 saves. 

Ottawa was trailing 2-1 when Josh Norris thought he had tied the game at 13:18 of the third. But, officials determined a hand pass was involved. 

The Senators did come back to tie the game at 2-all with a power-play goal at 16:42, when Tarasenko sent a shot past Swayman. 

Leading 1-0 after one period, Boston extended its advantage at 8:19 of the second when Frederic beat Korpisalo high to the blocker side. The Senators cut the lead to one with a late power-play goal. 

Drake Batherson made a backhand pass to Chabot, who snapped a shot past Swayman for his second of the season. 

The goal resulted in a scrum behind the net, and Chabot got punched by Charlie McAvoy, triggering a larger scrum and roughing penalties assessed to McAvoy, Wotherspoon, Tim Stuzle, with an unsportsmanlike conduct penalty to Batherson. 

The Bruins were largely outplayed in the first, but still held a one-goal lead after the opening 20 minutes. 

Ottawa failed to capitalize on its two power-play chances, while Boston scored three seconds into its power play at 18:36 of the first. Pastrnak beat Korpisalo from just inside the blue line on the Bruins' third shot of the period. 

Senators forward Shane Pinto made his home debut after serving a 41-game suspension for gambling. Pinto had returned to action and picked up a point in a win at Philadelphia on Sunday. 

UP NEXT 

Bruins: At Philadelphia Flyers on Saturday.
Senators: Host the New York Rangers on Saturday.