Chris Kelly/By S. Bradley

Chris Kelly/By S. Bradley

WILMINGTON — If the Bruins are going to find out what 2014 first-round David Pastrnak can contribute in the NHL as an 18-year-old and play him for more than the 7:53 he played in his debut on Monday, they might as well skate him on a line with their best all-around forward.

So that’s where coach Claude Julien placed Pastrnak for practice on Wednesday, as Patrice Bergeron was the rookie’s center. Brad Marchand completed the line.

Pastrnak’s linemates from the game the other night — Jordan Caron and Alexander Khokhlachev — were sent back to Providence of the American Hockey League on Tuesday.

One of Julien’s favorite whipping boys Reilly Smith was moved to a four-man fourth line with Seth Griffith, Matt Fraser and Chris Kelly, who skated for the first time since he was injured in the Bruins’ win at Columbus last Friday.

Kelly, of course, wouldn’t reveal the nature of his injury other than to say it was upper-body, it wasn’t hit back and it wasn’t anything to do with his head. So that narrows it down.

Defensemen Zdeno Chara and David Warsofsky skated before the team. Center David Krejci was absent.

The Bruins also realigned their power play. Torey Krug and Bergeron ran the points on one group with Loui Eriksson, Carl Soderberg and Griffith up front. Dougie Hamilton and Smith ran the points on the other group with Milan Lucic, Pastrnak and Marchand up front.