/https%3A%2F%2Fsportsmole-media-prod.s3.gra.io.cloud.ovh.net%2F13%2F38%2Fian-williams.jpg "49ers place Williams on injured reserve")
The San Francisco 49ers have placed Ian Williams on season-ending injured reserve after he injured his ankle against the Seattle Seahawks at the weekend.
The nose tackle reportedly sustained a fracture during a hit from Seahawks guard JR Sweezy in the first quarter of Sunday's 29-3 defeat.
The NFC West side signed fullback free agent Owen Marecic to a one-year contract to take Williams's spot on the roster.
Williams joined the 49ers as an undrafted free agent in 2011.
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San Francisco 49ers
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