Ex-49ers LB Patrick Willis: I'm not returning to NFL
Patrick Willis - Wikipedia
Patrick Willis Explains Decision to Retire from NFL
Patrick Willis Explains Decision to Retire from NFL
49ers LB Patrick Willis retiring after injury-shortened season – New York Daily News
Patrick Willis Explains Decision to Retire from NFL
49ers training camp report: Tim Hightower -- not Carlos Hyde -- on field for first play of practice
49ers LB Patrick Willis retiring after injury-shortened season – New York Daily News
Patrick Willis Explains Decision to Retire from NFL