Pastrnak has a small, non-displaced crack in his foot and his return is indefinite, general manager Don Sweeney told local reporters Wednesday.
The 19-year-old sophomore has not played since Halloween. He has two goals and two assists in 10 games this season.
The crack is resulted from a shot that struck Pastrnak’s foot in a game against the Arizona Coyotes on Oct. 27.
“Things changed a little bit,” Sweeney told reporters. “The initial X-rays were normal. We waited for swelling to go down. The symptoms were still persisting, so we went to a have a more definitive CT scan. And it did reveal a small, non-displaced crack in an awkward location, so we have to give him some time.
“The course of action doesn’t change for him, except he just needs a little more rest.”
In other Bruins injury news, Sweeney said prospect Alexander Khokhlachev had surgery on his hand and will be out an estimated four to six weeks.
Veteran defenceman Dennis Seidenberg has yet to play this season and was projected to return in late November after undergoing surgery to repair a herniated disc in his spine.
Julien said Seidenberg is still being evaluated but is getting closer to a return.
The Bruins snapped a three-game losing skid Sunday with a win over the New York Islanders and host the Colorado Avalanche Thursday at TD Garden.