Patrick Willis Explains Decision to Retire from NFL
Grading the 49ers draft -- not a total failure, but close
49ers news: Patrick Willis says he would have retired if the Niners and Jim Harbaugh's relationship didn't fall apart - Niners Nation
49ers LB Patrick Willis retiring after injury-shortened season – New York Daily News
49ers LB Patrick Willis retiring after injury-shortened season – New York Daily News
Ex-49ers LB Patrick Willis: I'm not returning to NFL
Patrick Willis' Shock Retirement Marks Official End of Jim Harbaugh-Era 49ers, News, Scores, Highlights, Stats, and Rumors
Ex-49ers LB Patrick Willis: I'm not returning to NFL
Did 49ers legend Patrick Willis just hint at an NFL comeback?