Patrick Willis Explains Decision to Retire from NFL
49ers' top five players of 2000s: Where Patrick Willis, Frank Gore
Patrick Willis says his surprise retirement was the right decision
49ers LB Patrick Willis retiring after injury-shortened season
Is Patrick Willis A Hall Of Famer?
49ers: 3 options San Francisco has to replace Joe Staley if he retires
Patrick Willis: News, Stats, Bio & More - NBC Sports
The Life And Career Of Patrick Willis (Story)
Patrick Willis to retire after 8 seasons with San Francisco 49ers
Patrick Willis Explains Decision to Retire from NFL