Patrick Willis retiring after eight seasons with 49ers
Patrick Willis Explains Decision to Retire from NFL
The most physically grueling game I've ever played in
Patrick Willis career highlights
49ers hit hard after unexpected offseason departures - The Boston
Watch From Tackles to Tech: Patrick Willis' New Position - Bloomberg
Patrick Willis is Headed to the 49ers Hall of Fame
49ers boast one of best linebacking corps around - The San Diego
Chris Borland, Fearing for Health, Retires From the 49ers. At 24
Regular Season Game 13 - Chiefs at Broncos (12-11-22) by Kansas
San Francisco 49ers: Justin Smith Versus Patrick Willis in the
Patrick's Legacy - Niners Nation
Troy Polamalu and Patrick Willis head first-time Hall of Fame