Did 49ers legend Patrick Willis just hint at an NFL comeback?
Patrick Willis Explains Decision to Retire from NFL
Why would an NFL star retire when he can still play? Patrick Willis explains why he walked away in his prime
Report: 49ers expect Patrick Willis to retire
The Life And Career Of Patrick Willis (Story)
49ers' Patrick Willis retires 'happy' – The Mercury News
49ers' Patrick Willis retires 'happy' – The Mercury News
Patrick Willis still thriving after early 49ers retirement
49ers announce Patrick Willis is retiring - NBC Sports