Former NFL linebacker Jim Fahnhorst has tragically passed away.

The 49ers announced Fahnhorst’s death Thursday, saying the franchise was left “deeply saddened by the passing.”

The three-time Super Bowl winner was just 66-years-old.

Keith Fahnhorst formed an incredible duo for four seasons alongside his younger brother, Jim.

Jim was a 49ers offensive lineman from 1974 to 1987. He unfortunately lost his life in 2018 and just so happened to be 66 as well.

In July, the 49ers were also mourning the loss of a fan named David, who was dealing with heart failure, and one of his last wishes was to meet players of his favorite team.

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Three-time Super Bowl champion linebacker Jim Fahnhorst, who played seven seasons with the San Francisco 49ers, passed away on Wednesday.

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