In Claude Julien's defensive system, there is no room for cherry-pickers, especially if you're a center.

The job demands flawless positioning, usually deep in the defensive zone. Only once the puck is out of the zone can the center, his defensive duties complete, skate the other way.

Yet Patrice Bergeron, the Bruins' best defensive center, is the club's No. 2 scorer.

"With our system, the centerman's not blowing the zone or cheating, things like that,'' said fellow center Chris Kelly. "A lot of the time, you're the last one out of the zone or the second one out of the zone. He still manages to create a lot of offense in this system.''