San Francisco 49ers inside linebacker Patrick Willis (52) reacts after stopping Atlanta Falcons running back Steven Jackson (39) short of the first down in the fourth quarter in a game at Candlestick Park Monday December 23, 2013 in San Francisco, Calif.
San Francisco 49ers inside linebacker Patrick Willis (52) reacts after stopping Atlanta Falcons running back Steven Jackson (39) short of the first down in the fourth quarter in a game at Candlestick Park Monday December 23, 2013 in San Francisco, Calif. Paul Kitagaki Jr. pkitagaki@sacbee.com
San Francisco 49ers inside linebacker Patrick Willis (52) reacts after stopping Atlanta Falcons running back Steven Jackson (39) short of the first down in the fourth quarter in a game at Candlestick Park Monday December 23, 2013 in San Francisco, Calif. Paul Kitagaki Jr. pkitagaki@sacbee.com
49ers with Matt Barrows

49ers with Matt Barrows

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It’s official: Patrick Willis announcing retirement today

March 10, 2015 08:21 AM