Patrick Willis Explains Decision to Retire from NFL
MMBM: Patrick Willis is a quitter not a hitter, good riddance
49ers news: Why Patrick Willis should be a lock as first ballot Hall of Famer - Niners Nation
Larry Allen gave Patrick Willis his welcome to the NFL moment - NBC Sports
NFL Rookie: Patrick Willis, MLB, 49ers - Sports Illustrated
Patrick Willis Explains Decision to Retire from NFL
Patrick Willis Explains Decision to Retire from NFL
Did 49ers legend Patrick Willis just hint at an NFL comeback?
Mic'd Up: Patrick Willis in Candlestick Finale
Patrick Willis out for rest of season - ABC7 Chicago
Patrick Willis of San Francisco 49ers retires - ESPN