Detroit Red Wings defenseman Brendan Smith told MLive.com that he has a sprain of the AC joint in his right shoulder, and estimated he would be out 3-4 weeks.
Smith was injured midway through the first period of Saturday's game against the Columbus Blue Jackets, when he was hit into the boards by Columbus' Derek MacKenzie.
The Red Wings' defense corps has been hit hard by injuries. Smith will be the sixth blueliner to miss time due to injury already this season.
Smith is second on the Wings with a plus-4 rating, and he has one assist in eight games.