Borgen and Clifton: Just the appetizer for Bruins' blue line overhaul

The Bruins have made their opening moves on the back end, but don't mistake these acquisitions for a completed project. Boston's front office is signaling that more defensive reinforcements could be on the way before the dust settles on free agency. The question isn't whether these two defensemen are enough - it's what other moves are already being discussed behind closed doors to complete the puzzle.