WILMINGTON — Bruins coach Claude Julien said that defenseman David Warsofsky, who was one of three players to miss practice Friday, is going to be out “a while.”

“I don’t know how long,” Julien added.

Warsofsky’s last shift against Edmonton on Thursday was with 6:46 remaining in the game. Julien couldn’t expand on Warsofsky’s status and would not give any details about the injury.

Centers David Krejci and Patrice Bergeron also missed practice. Bergeron was given a maintenance day, according to Julien. Krejci is still battling the injury that forced him to miss two games recently.

In four games since being recalled from Providence of the AHL, Warsofsky has one assist and a plus-1 rating. With Warsofsky on the shelf, the Bruins have six healthy defensemen. This could force Matt Bartkowski, who’s been a healthy scratch the past four games (all wins), back into the lineup. The Bruins are also without Zdeno Chara, Kevan Miller and Torey Krug because of injuries.

Of course, Krug might be ready to return soon. He practiced with the team Friday.