Last-place Sabres' injury list grows with G Lieuwen, D Ruhwedel out with concussions

Philadelphia Flyers' Vincent Lecavalier, left, controls the puck while trailed by Buffalo Sabres' Christian Ehrhoff behind the Sabres' net, during the second period of an NHL hockey game, Sunday, April 6, 2014, in Philadelphia. The Flyers won 5-2. (AP Photo/Tom Mihalek) (The Associated Press)

Detroit Red Wings' Johan Franzen (93), of Sweden, tries a back-hand pass against Buffalo Sabres' Chad Ruhwedel (5) while in front of Buffalo Sabres goalie Matt Hackett (31) during the second period of an NHL hockey game Friday, April 4, 2014, in Detroit. (AP Photo/Duane Burleson) (The Associated Press)

Buffalo Sabres goalie Nathan Lieuwen and defenseman Chad Ruhwedel will miss the final week of the season after being diagnosed with concussions.

Defensman Christian Ehrhoff's playing status is uncertain against Detroit on Tuesday. Ehrhoff was struck by a puck and required stitches to close a gash on his right ear.

Coach Ted Nolan provided the updates following practice Monday, a day after the three were hurt in a 5-2 loss at Philadelphia.

Lieuwen's injury means the Sabres will have to dress their seventh goalie this season.

On the bright side, Nolan says forwards Marcus Foligno, Chris Stewart and Torrey Mitchell have a chance to return to play against the Red Wings.

The Sabres (21-48-9) have four games left and are guaranteed to finish in last place.