Could Danton Heinen remain on Bruins’ top line when David Pastrnak returns? The results speak for themselves

(Photo by Steve Babineau/NHLI via Getty Images)

For most of the 2018-19 season, Bruce Cassidy has opted to keep his three-headed monster of a line in Patrice Bergeron, Brad Marchand and David Pastrnak intact, giving the Bruins a do-it-all trio that can cycle the puck with the best of them of them in the offensive zone.

The 63-37-88 line creates a bit of a top-heavy roster, for sure, but you can’t argue with the numbers. In 388 minutes of 5v5 TOI together, the regular Bergeron line has generated 23 goals and plus-36 shot differential. When looking at scoring rates per 60 minutes of play, that equals out to 3.55 goals for / 60 minutes and 11.88 high-danger attempts generated / 60 for Boston’s top forward group.

So why then, once Pastrnak is cleared to return from his thumb surgery, might Cassidy opt to put the dynamic winger on the second line with David Krejci?