After trading Brandon Carlo at the trade deadline back in March, they acquired Henri Jokiharju from the Buffalo Sabres. He was paired with Nikita Zadorov for the final six weeks of the season, and they actually played well for the rest of the season.
In fact, it was a good enough pairing that general manager Don Sweeney brought Jokiharju back this summer on a new deal. That leaves the Black and Gold's right side of Charlie McAvoy (returning from his season-ending injury last year), Andrew Peeke, and Jokiharju entering camp in a couple of weeks. However, one player from a Western Conference team could be on the move, and the Bruins have been linked to him.