49ers Patrick Willis Officially Announcing Retirement - CBS Sacramento
49ers LB Patrick Willis retiring after injury-shortened season – New York Daily News
Report: Former Ole Miss great Patrick Willis to retire
Patrick Willis Explains Decision to Retire from NFL
49ers Alumnus Patrick Willis to Be Inducted into Bay Area Sports Hall of Fame
49ers' Patrick Willis at peace with decision to retire
Will former 49ers linebacker Patrick Willis ever be inducted in Hall of Fame? Voters offer perspective
49ers LB Patrick Willis to retire - ABC7 Chicago
Patrick Willis retiring after eight seasons with 49ers
Patrick Willis: 49ers rift with Jim Harbaugh didn't cause retirement
49ers' Patrick Willis retires 'happy' – The Mercury News