"Speed complements David," Cassidy said. "We knew that, watching the Bruins over the years, [there are] guys that are willing to get to the net and draw some people away from [Krejci], so it opens up the middle of the ice with gap control, or draw people to [Krejci], so he can pitch it out there, however they decide to play him.
"If they try to play him up and tight, that speed helps. If they play loose, then it gives him room to kind of find those open seams and take the extra second and make the play."
As Cassidy said, it's not just the foot speed; it's the shot, too, one that DeBrusk can get by goalies from distance "with a good release when they've seen it." That gives DeBrusk versatility in ways he can score, and in ways he can support his linemates in the offensive zone.
"I think I complement them specifically on the forecheck," said DeBrusk, who had 43 points (16 goals, 27 assists) this season. "I think that's where I can get to areas, get to loose pucks, and try to retrieve it for them. Get them as much space as they need. They're really good players, they're both really special in their own ways.
"I'm very honored and humbled to be on that line, so I'll do whatever it takes to get there. I've been trying to figure that out myself, just what I can do to help the line."
Though, watching him, it seems that he already has.