NFL Legend Patrick Willis to Deliver 2020 UM Commencement
Patrick Willis closes door on return, discusses foot issues as
Ex-NFL player Patrick Willis: What leaving football for Silicon
49ers' Willis hangs up the cleats
Patrick Willis Announces His Retirement, Fulfills His Legacy - stack
Hanging It Up: Retirement Is the Latest NFL Trend
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Patrick Willis to announce retirement - ABC7 New York
49ers LB Patrick Willis retiring after injury-shortened season
San Francisco 49ers Patrick Willis and Justin Smith Set To Retire