Patrick Willis Cherishes SB Experience
Patrick Willis Explains Decision to Retire from NFL
Patrick Willis' Shock Retirement Marks Official End of Jim Harbaugh-Era 49ers, News, Scores, Highlights, Stats, and Rumors
Patrick Willis Explains Decision to Retire from NFL
49ers news: Patrick Willis says he would have retired if the Niners and Jim Harbaugh's relationship didn't fall apart - Niners Nation
NWH-12-1-2013 by Shaw Media - Issuu
Patrick Willis Announces Retirement from NFL
Is Chris Borland an outlier or the start of a trend? With concussion risks still uncertain, it's tough to say