The 49ers placed safety Eric Reid on the Injured Reserve list on Tuesday, the team announced, hours after he underwent surgery to repair a torn right biceps.
To fill the void, safety Vinnie Sunseri was promoted from the practice squad. The former Saints safety was signed to the 49ers' practice squad on Nov. 1 after being released by the Patriots.
Safety Marcus Ball was signed to the practice squad to take Sunseri's spot. Ball was released from the Jaguars' practice squad on Oct. 24.
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SIGN UP HERE Reid sustained the torn biceps during Sunday's game against the Patriots.