It was no secret that the Boston Bruins have wanted to add a defenseman ever since Dennis Seidenberg went down for the season, and they finally made their move in sending a third round pick to the Philadelphia Flyers in exchange for Andrej Meszaros.
Meszaros can not provide the same kind of game that Seidenberg does, but he can move the puck, and has a positive relative Corsi% this year in spite of struggling with injuries.
He has the ability to put up points and play on the powerplay, but he isn't the kind of guy you want to rely on to run your team's transition game. Luckily for the Bruins, they have Zdeno Chara and Dougie Hamilton to do that, making Meszaros a depth player who should help them overall.
Meszaros has been relatively sheltered in Philadelphia, but could fit well with Torey Krug on Boston's third pairing, as Chara absorbs almost all of the tough minutes for Boston defensively, freeing up their third pairing to produce offense.
The Flyers also benefit from this move, shedding Meszaros' salary, freeing them up to potentially add somewhere else. Meszaros makes $4M this season, and is an unrestricted free agent in the summer.