OTTAWA – The Boston Bruins kicked it into gear in the third period to beat the Ottawa Senators on a night when a scorecard really was needed to keep up with all the players coming and going.

Brad Marchand scored twice and Nathan Horton had a goal and an assist to lead Boston over Ottawa 4-2 Friday night.

Tuukka Rask made 32 saves and Dennis Seidenberg also scored for the Bruins, who acquired three-time All-Star defenseman Tomas Kaberle from Toronto in one of two trades completed by General Manager Peter Chiarelli earlier in the day.

Kaberle made his Bruins debut along with former Senators center Chris Kelly, who was acquired in a trade with Ottawa on Tuesday.

“I got here 20 minutes before warm-up and sometimes it’s the best way to do it,” Kaberle said. “All the guys were great to me. It was a big win for us and it makes for an emotional day for me after 13 years in Toronto.”

Marchand scored his second goal of the game, Boston’s third of the third period, to put the Bruins up 4-1 at 15:52, just 32 seconds after Seidenberg’s power-play goal.

“We’re the best team in the third period in the league and we really wanted to use it to our advantage,” Marchand said. “We kept building as the game went on and we wanted another big third. These are big points for us and everyone brought it in the third.”

Bobby Butler scored for a third straight game early in the second to give the Senators a brief 1-0 lead. Alex Kovalev scored a power-play goal with 1:30 left in the third to draw Ottawa within two.

Robin Lehner stopped 29 shots for Ottawa, which swapped goalies with Colorado on Friday.

Senators GM Bryan Murray acquired Craig Anderson from the Avalanche for Brian Elliott after trading left wing Jarkko Ruuttu to Anaheim Thursday night.

Kaberle was acquired from Toronto earlier in the day in a trade that sent Boston prospect Joe Colborne and two draft picks to the Maple Leafs.

“To have a guy like that, it gives you extra confidence and obviously ability to make plays because you know that guys are going to have that puck,” Bruins captain Zdeno Chara said. “He’s going to make that play, he’s going to make that pass, and to have that it helps everybody, and everybody around is going to be better.”

DEVILS 1, RANGERS 0: Ilya Kovalchuk scored for the fourth straight game and Johan Hedberg made 15 saves to give the streaking Devils a home win.

RED WINGS 4, PANTHERS 3: Todd Bertuzzi had two goals, including the tiebreaker with 7:32 remaining, to lift the Red Wings to a road win.

BLUES 3, SABRES 0: Ty Conklin stopped 25 shots to lead the Blues to a win in Buffalo, N.Y.

HURRICANES 3, FLYERS 2: Erik Cole scored with 3:03 left to lift Carolina to a home victory.

WILD 5, DUCKS 1: Matt Cullen scored a short-handed goal, Eric Nystrom scored his first career power-play goal and the Wild won at home.

BLUE JACKETS 4, BLACKHAWKS 3: Antoine Vermette, Derek MacKenzie and Anton Stralman scored in a span of 5:54 in the second period and Columbus won in Chicago.

NOTES: Defenseman Eric Brewer dropped his no-trade clause and allowed the Blues to send him to the Lightning. In exchange for trading their captain, the Blues got defenseman Brock Beukeboom, an unsigned draft pick and a third-round pick in the 2011 draft. … The Sharks acquired defenseman Ian White from the Hurricanes in exchange for a draft pick in 2012. … The Avalanche swapped one struggling goaltender for another, acquiring Brian Elliott from the Senators for Craig Anderson. … The Hurricanes honored the captain of their only Stanley Cup championship team by retiring Rod Brind’Amour’s jersey No. 17.