The 30-year-old defensive end is out indefinitely due to surgery on his knee, according to the Boston Herald's Ian Rapoport.
According to the report, Green won't be placed on season-ending injured reserve — at least for now — as the surgery may have been a scope.
In seven games, Green has 18 tackles and no sacks. In his eight-year career, he's made 214 tackles and 27 sacks.