You can bet money on this tonight: if someone from the Bruins challenges Pittsburgh’s Kris Letang to a fight, the defenseman will have his sweater tied down properly.

Unfortunately for Letang and the Penguins, that wasn’t the case last night in New Jersey.

With Letang, a Norris Trophy candidate this season, ejected early in the game because an unlikely fight with Travis Zajac revealed he didn’t have his sweater tied properly , the Penguins couldn’t muster enough effort to prevent losing to the Devils, 2-1, in overtime.

The Penguins, who canceled their morning skate today, will take on the Bruins at  TD Garden at 7 p.m.

Letang’s fight strap was just the latest tie to baffle the Sidney Crosby-less, Evgeni Malkin-less Penguins, who have now lost four times in their last seven games in a shootout or overtime. Without two of their stars and missing a solid cast of supporting players — including Brooks Orpik and Chris Kunitz — the Penguins have obviously been playing a more workman-like brand of hockey just to earn those single standings points. And they’ve hung in there (they’re in fourth in the Eastern Conference and just four back of Philadelphia for first place), which is all the more reason the Bruins cannot take tonight lightly.

The Penguins might even get a little healthy, with Kunitz apparently ready to return, tonight. Marc-Andre Fleury took the night off in New Jersey, so the Pens should have their No. 1 man in between the pipes. The Bruins’ seven-game winning streak is in for a stiff test.