Why would an NFL star retire when he can still play? Patrick Willis explains why he walked away in his prime
State Your Case: Patrick Willis' days were short but his impact was HOF worthy - Talk Of Fame
Patrick Willis says his feet carried him away from the game
Former 49ers star Patrick Willis not sold on trading Jimmy Garoppolo: 'They can win with him'
49ers' loss of Patrick Willis a jarring one – The Mercury News
Patrick Willis Retired in His Prime, But Where is He Now? - FanBuzz
Patrick Willis career highlights
San Francisco 49ers: Who Will Replace Patrick Willis and Chris Borland?, News, Scores, Highlights, Stats, and Rumors
Can Steelers ILB Lawrence Timmons out-value Patrick Willis as a 2007 draft pick? - Behind the Steel Curtain
49ers linebacker Patrick Willis faces surgery, is out for season - Los Angeles Times
49ers Alumnus Patrick Willis to Be Inducted into Bay Area Sports Hall of Fame
49ers' Patrick Willis at peace with decision to retire
Patrick Willis, ex-teammates praise Joe Staley upon 49ers retirement – Daily Democrat
Patrick Willis - Wikipedia
49ers' Patrick Willis lost for season (w/video)