Just about every unit on the Bruins’ roster has at least lived up to expectations this season – except for the third line. This line has been a point of contention all season long, and despite showing signs of breaking out here and there, the overall production has been lacking. It’s led Julien to call the line out at times, and the ineffectiveness of Chris Bourque sent the longtime fringe player back to the American Hockey League. In his stead, the B’s recalled Jordan Caron from the A, and we still can’t appropriately grade his performance. But on the whole, the line has been lacking this season, which is a departure from just a year ago, let alone two years ago during the Stanley Cup run. This line lacks a true goal-scorer and while each member of the line brings some nice things to the table, they can’t put the puck in the net. The Bruins don’t need to upgrade much at the trade deadline, but upgrading this line seems to be the obvious starting point, especially if you can bring in a veteran goal scorer who is also defensively responsible. That’s another problem. You can at least stomach the lack of production from the third line, so long as they’re playing effectively in their own end. That hasn’t been the case at times this season, which is part of the reason they’ve been so ineffective.