The San Francisco 49ers have activated nose tackle Glenn Dorsey following his 21-day evaluation window, putting him in position to play for the first time Sunday against Washington if he's deemed ready.

Dorsey tore his left biceps Aug. 1 and required surgery. He was placed on the injured reserve/designated to return list with the hopes he would be able to come back this season.

San Francisco cleared room on the 53-man roster by placing nose tackle Ian Williams on season-ending IR because of a fractured left fibula suffered at New Orleans on Nov. 9. He was sidelined last year following a Week 2 ankle injury against Seattle that required several procedures. Williams was in a walking boot and using crutches last week.

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