Ex-NFL player Patrick Willis: What leaving football for Silicon Valley taught me
Report: Former Ole Miss great Patrick Willis to retire
Patrick Willis Explains Decision to Retire from NFL
49ers' Patrick Willis isn't in the Hall of Fame and is too busy to care - ESPN - NFL Nation- ESPN
49ers in flux as Patrick Willis, Justin Smith retire - Sports Illustrated
Patrick Willis Explains Decision to Retire from NFL
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Ronnie Lott Chopped His Pinky Off So He Didn't Miss a Game - FanBuzz
Patrick Willis Explains Decision to Retire from NFL
49ers news: Patrick Willis says he would have retired if the Niners and Jim Harbaugh's relationship didn't fall apart - Niners Nation
Patrick Willis Retired in His Prime, But Where is He Now? - FanBuzz