Patrick Willis Retired in His Prime, But Where is He Now? - FanBuzz
49ers LB Patrick Willis retiring after injury-shortened season – New York Daily News
San Francisco 49ers: Patrick Willis credits Bruceton, Tennessee for NFL success
Patrick Willis Explains Decision to Retire from NFL
Ex-49ers star Patrick Willis says of NFL return: 'Nope, I'm cool' – East Bay Times
San Francisco 49ers - Wikipedia
Retired 49ers LB Patrick Willis denies report of 2016 comeback
Patrick Willis closes door on return, discusses foot issues as reason for retirement - Niners Nation
Patrick Willis of San Francisco 49ers retires - ESPN
Ex-49ers LB Patrick Willis: I'm not returning to NFL
Patrick Willis Explains Decision to Retire from NFL