49ers Rumors Roundup: Patrick Willis, Justin Smith To Retire
49ers Patrick Willis retiring after injury-shortened season
Retired 49ers LB Patrick Willis denies report of 2016 comeback
49ers LB Patrick Willis retiring after injury-shortened season
Super Bowl: 49ers' Willis does it his way – Orange County Register
Forty-Niners Linebacker Patrick Willis To Retire
Will former 49ers linebacker Patrick Willis ever be inducted in
San Francisco 49ers: Patrick Willis credits Bruceton, Tennessee
Might ex-49ers star Patrick Willis come out of retirement?