49ers training camp report: Tim Hightower -- not Carlos Hyde -- on
49ers news: Patrick Willis says he would have retired if the
Patrick Willis Explains Decision to Retire from NFL
Patrick Willis explains why he had to retire in prime of career
Patrick Willis Explains Decision to Retire from NFL
Baltimore Ravens LB Zachary Orr retires at 24 due to neck/spine
Report: Former Ole Miss great Patrick Willis to retire
Patrick Willis: Decision to retire was about his health and heart
Patrick Willis Opens up About his Difficult Decision to Retire
A Sign of the Future? Concussions Push NFL Players to Retire Early
Retired 49ers LB Patrick Willis is now just another Silicon Valley
Willis retirement hits 49ers in the gut – SFBay