Other teams have until noon ET Friday to make a claim on Bourque. If he clears, the Bruins will assign him to the Providence Bruins, where he played during the NHL work stoppage earlier this season.
Bourque, the son of Bruins legend and NHL Hall of Famer Ray Bourque, participated in the Bruins' morning skate Thursday at TD Garden in preparation for Thursday's game against the Toronto Maple Leafs. After the skate, Bruins coach Claude Julien said he expected lineup changes after two straight losses. With Bourque out, veteran forward Jay Pandolfo will be in the lineup.
In 18 games with the Bruins, Bourque has one goal and three assists for four points while posting a minus-6.
ESPNBoston.com's Joe McDonald and James Murphy contributed to this report