Aldon Smith reinstated, Patrick Willis on season-ending IR for San Francisco 49ers
Linebacker Patrick Willis is ready to retire, even though he's only 30 – The Denver Post
Patrick Willis (toe) placed on 49ers' season-ending IR
The Life And Career Of Patrick Willis (Story)
49ers' loss of Patrick Willis a jarring one – The Mercury News
Patrick Willis will carry on Lewis' No. 52 legacy, Professional/National Sports
49ers expect Patrick Willis to retire, per report
Former 49ers among Hall of Fame hopefuls
NFL: Players call it quits in prime of careers
49ers' Patrick Willis lost for season (w/video)
Patrick Willis' Shock Retirement Marks Official End of Jim Harbaugh-Era 49ers, News, Scores, Highlights, Stats, and Rumors
Patrick Willis tried to Volunteer, was turned away in tears - Newsday
San Francisco 49ers linebacker Patrick Willis to retire
San Francisco 49ers: Catching up with Hall of Fame candidate Patrick Willis - Niners Nation
49ers LB Patrick Willis to retire - 6abc Philadelphia