49ers' Patrick Willis retires 'happy' – The Mercury News
Report: 49ers expect Patrick Willis to retire
49ers' Patrick Willis retires 'happy' – The Mercury News
San Francisco 49ers linebacker Patrick Willis will retire
Report: 49ers expect Patrick Willis to retire
Linebacker Patrick Willis To Announce Retirement
From His First to Last, Patrick Willis Remembers His 49ers HOF Career
49ers' loss of Patrick Willis a jarring one – The Mercury News
Patrick Willis, ex-teammates praise Joe Staley upon 49ers retirement – Daily Democrat