OTTAWA – Joe Thornton scored with 9:03 left and the Boston Bruins ended a season-high, five-game winless streak with a 3-2 victory over the Ottawa Senators on Saturday night.

Thornton scored the go-ahead goal off a turnover in the Ottawa zone. Boston defenseman Nick Boynton stopped the puck at the blue line and set up Thornton, who beat goalie Patrick Lalime through the legs with a shot from the left circle.

Brian Rolston scored a short-handed goal in the second period to tie it at 2 after making a superb pass to set up Glen Murray’s opening goal 6:32 in.

Ottawa lost for just the second time in seven games (4-2-1).

Zdeno Chara and Bryan Smolinski scored as the Senators converted both power-play opportunities in the first to take a 2-1 lead.

Ottawa was poised to do more damage with the man advantage midway through the second when Thornton was sent off for high-sticking. But Rolston scored his first short-handed goal of the season off a two-on-one with Ted Donato at 10:56.

, just nine seconds into the power play.

Ottawa lost two players to injury. Vaclav Varada had to be helped off the ice by teammates after he hurt his left leg 7:43 in when he collided with Boston rookie Patrice Bergeron. Senators defenseman Brian Pothier injured his head when he was checked to the ice by defenseman Nick Boynton in the second.

Rolston earned an assist on Murray’s goal to open the scoring 6:32 in as he made an outstanding cross-ice pass to send his teammate in alone on Patrick Lalime.

Murray also made a fine play on the goal, sending Lalime sprawling as he swept across the goal mouth from the right side before lifting a backhand over the goalie.

Jason Spezza helped the Senators recover to take a 2-1 lead as he set up both power-play goals.

Chara got his seventh goal to tie it on a power play at 11:20, beating Andrew Raycroft from the slot after Marian Hossa hit the post when he was sent in by Spezza.

Smolinski scored for the second straight game at 18:28 when he fired a shot past Raycroft after taking Spezza’s pass from the right boards.

Notes: Rolston has 25 career short-handed goals. … Bruins LW Doug Doull fought twice with Ottawa’s Chris Neil in the first period.

AP-ES-12-13-03 2202EST