Krejci has missed two games since he was injured in the first period of a 4-2 win over Anaheim on Oct. 14. He has one assist this season.
Bruins general manager Don Sweeney said the team has recalled forward Anders Bjork from Providence on an emergency basis.
Bjork leads Providence of the AHL with three goals and five assists.
The Bruins also will be without right wing Karson Kuhlman after he suffered a hairline nondisplaced fracture of his right tibia in Saturday's 4-3 overtime loss to the Toronto Maple Leafs. Kuhlman will be reevaluated in approximately four weeks.
Boston (5-1-1) hosts Toronto (5-3-2) Tuesday night.