The announcement came after Gallagher practiced with his teammates at Gillette Stadium on Thursday.
Gallagher said he will wear special padding on his glove to help protect the fingers.
Gallagher had nine goals and 10 assists in 22 games this season before the injury. In two games against the Bruins, he had three assists.Information from The Associated Press was used in this report.
Information from The Associated Press was used in this report.