49ers sign Kion Wilson, IR Blake Castonzo
The San Francisco 49ers signed former Pittsburgh Steelers linebacker Kion Wilson.
49ers linebacker Blake Costanzo was placed on injured reserve.
Wilson played in seven games last season for the Steelers with two starts.
Wilson has previous stints with the San Diego Chargers and Cxarolina Panthers.
Wilson has played in 15 career games.
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Aaron Wilson covers the Ravens for The Baltimore Sun