Might ex-49ers star Patrick Willis come out of retirement?
Retired 49ers LB Patrick Willis denies report of 2016 comeback
Patrick Willis Explains Decision to Retire from NFL
Patriots Tom Brady's longevity? Ex-49ers star mystified
Patrick Willis Explains Decision to Retire from NFL
Patrick Willis Explains Decision to Retire from NFL
49ers' Patrick Willis retires 'happy' – The Mercury News
Patrick Willis Explains Decision to Retire from NFL
49ers Patrick Willis retiring after injury-shortened season – The