SUNRISE, Fla. -- Florida Panthers interim coach Tom Rowe said before Saturday's game that his team had to "get this mental block out of our heads," adding that they should perhaps pretend those weren't the Boston Bruins in white, yellow and black.

Guess what?

The mental block -- and a physical one, too, in the form of goalie Tuukka Rask -- continued on Saturday as Brad Marchand scored twice in Boston's 4-0 win over Florida at the BB&T Center.

Rask had 25 saves, and David Backes and Riley Nash also scored for Boston, which is 4-0-0 against Florida this season. Rask was in goal for all four of those games.

"He's a great goalie, no doubt about it," Panthers defenseman Aaron Ekblad said. "He's had our number for a while."

All the numbers, in fact, went against the Panthers on Saturday. Florida went 0-for-3 on its power play, for example. For the season, Florida is 0-for-16 in that category versus Boston.

Marchand scored on a shorthanded breakaway in the first period and on a power play in the second.

"That's the kind of guy he is," Bruins coach Claude Julien said of Marchand, who has 12 goals this season. "He can score in all situations."

Before this game, Marchand hadn't scored since Dec. 23. But he has five points, including three goals, in four games against the Panthers this season.

But Marchand isn't the only Bruins' player who has had success against Florida.

Backes, in his first game back since suffering a concussion on Dec. 29, has three goals in three games against Florida this season.

Rask is 19-3-1 in his career against Florida, including four shutouts. His goals-against average against Florida is 1.46, and his save percentage is .951.

"Tuukka was great," Bruins defenseman Torey Krug said when asked about Rask, who has 20 of Boston's 21 wins this season. "He was seeing the puck well."

Thanks in part to Rask, Boston (21-17-4) snapped a two-game losing streak.

Meanwhile, Florida (17-16-8) ended its homestand by going 1-2-0, getting outscored 9-3. Even worse for the injury-plagued Panthers: They lost center Greg McKegg in the second period due to an upper-body injury.

McKegg joins a lengthy injured list that includes goalie Roberto Luongo, defenseman Alex Petrovic and forwards Aleksander Barkov, Jonathan Huberdeau, Nick Bjugstad and Seth Griffith.

Boston opened the scoring with 7:12 left in the first period.

Marchand got his shorthanded goal after blocking a shot by Keith Yandle and then pouncing on the puck, skating in on Reimer and beating him with a backhand shot that tipped in off the right post. There was little room between Reimer's left skate and the post, but Marchand found the net.

After a second Bruins penalty -- this time on Nash for boarding -- the Panthers had a 5-on-3 advantage for 44 seconds. However, Florida got zero shots on goal during its 5-on-3 and went into the second period trailing 1-0.

Boston extended its lead to 2-0 on a goal by Backes with 15:47 left in the second period. The sequence started with an offensive-zone faceoff won by Boston. Reimer stopped the first shot on goal, but Boston retrieved the puck and kept the pressure on.

Finally, Zdeno Chara slipped a pass to Davis Krejci, whose shot from the point was deflected in by Backes.

The Bruins made it 3-0 on Marchand's power-play goal with 10:20 left in the second period. After a slashing penalty on Florida's Paul Thompson, it took Boston just 19 seconds to capitalize. Reimer stopped a shot by Krug, but Marchand was in perfect position to put away the rebound.

Nash made it 4-0 on his short-side, bad-angle goal that caromed in off of Reimer's back with 15:01 left in the third period. Kevan Miller got the assist.

Forward Jonathan Marchessault, who leads Florida with 12 goals, ripped his team in his postgame talk with the media.

"At 2-0, the game's not over. At 3-0, the game's not over," Marchessault said. "But we just stopped working.

"It started (in the season opener) Oct. 13 -- our consistency is terrible. It was the same thing tonight."

Marchessault said injuries cannot be used as an excuse.

"We're more than halfway through the season, and I don't think we even have a three-game win streak," said Marchessault, who is correct in that statement. "It's hard to be a good team if we can't get on a streak."

NOTES: Panthers second-line C Nick Bjugstad, who injured his groin on Friday, could miss at least two weeks. ... With Florida starting G Roberto Luongo (upper-body injury) sidelined, James Reimer got his second straight start, and Sam Brittain was called up from Manchester of the ECHL. A fourth-round pick in 2010, Brittain -- who has no NHL experience -- was 15-5-0 with a 2.62 at Manchester. ... Bruins D John-Michael Liles (concussion) practiced Friday and could return soon. ... Bruins prospect Charlie McAvoy, a 19-year-old defenseman, was named Player of the Game Thursday as he led Team USA over Canada in the World Juniors final. ... Boston assigned fourth-line LW Noel Acciari to Providence. ... Boston called up G Zane McIntyre, 24, from Providence of the AHL, where he was 10-0-0 with a 1.41 GAA. Ex-Bruins backup G Anton Khudobin (1-5-0) cleared waivers and was sent to Providence.