The Steelers placed linebacker Vince Williams on the Reserve/COVID-19 List on Thursday.
Williams has started all 12 games this season at right inside linebacker, a position already depleted with Devin Bush out for the season and Robert Spillane battling a knee injury he suffered against Washington.
Williams leads the Steelers in tackles with 63 on the season, including 41 solo stops and three sacks. He ranks fourth in the NFL in tackles for a loss with 14 and has two fumble recoveries.