I wrote last week about the Bruins’ struggles following offensive zone faceoff losses. Obviously, Shawn Thornton played a part in that, but a fourth line can only get so much ice time, and obviously there was a bigger issue. When I looked over the numbers from the past few years, it became clear that David Krejci and his linemates, who received a large portion of the offensive zone starts, were hurting the team the most in those situations. Considering Krejci’s new 6 year, $43.5 million contract, and the ongoing debate over whether he or Patrice Bergeron is truly Boston’s number one center, I decided to look briefly (update: not so briefly) at the breakdown of their numbers and where such struggles might be coming from. First of all, here are the numbers.