Sabres goalie Ryan Miller is out indefinitely with a concussion after being leveled by a hit from Bruins forward Milan Lucic. The Sabres revealed the nature of Miller's injury Sunday, while also announcing they had called up goalie Drew MacIntyre from their AHL affiliate in Rochester. MacIntyre is expected to serve as backup to Jhonas Enroth on Monday night at Montreal. "Hopefully it is not severe and hopefully it is not longterm," general manager Darcy Regier said.