Brad Marchand is no stranger to playing heel in opposing barns.

The longtime Bruins winger has long relished his role as the target of fans’ vitriol whenever he steps out on the ice in spots like Toronto, Montreal, Vancouver, and — prior to last spring — Florida.

But, the 37-year-old winger finds himself wading into uncharted waters on Tuesday night.

For the first time in his NHL career, Marchand will take to the ice at TD Garden as an opponent as the Panthers take on Boston in a nationally-televised matchup.

“It’ll be fun to play the Bruins,” Marchand said Monday after the Panthers wrapped up practice at TD Garden. “It’ll be fun to play against teammates and have friends and family in the building again. These are things that down the road I think I’ll really appreciate.

“And ther

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