Patrick Willis Explains Decision to Retire from NFL
Report: 49ers' Patrick Willis planning to retire
Carolina Panthers linebacker Luke Kuechly retiring from NFL
Senior Bowl to Induct Patrick Willis and Four Others into Hall of Fame
Carolina Panthers linebacker Luke Kuechly retiring from NFL
How the Broncos and Seahawks negotiated the Russell Wilson trade
Might ex-49ers star Patrick Willis come out of retirement?
NFL Players Who Retired At The Top Of Their Game
The Most Surprising Reasons These Sports Stars Retired Early
Ex-49ers LB Patrick Willis reflects on decision to retire: 'It was
Calvin Johnson continues the trend of NFL stars retiring early
49ers' Patrick Willis at peace with decision to retire