Charles Woodson's career remembered after retirement announcement
Charles Woodson will retire at season's end
Michigan football great Desmond Howard thinks it's time his No. 21
UM's Howard on jersey retirement: 'I wanted to make 21 significant'
Charles Woodson Announces Retirement from NFL
Raiders safety Woodson to retire after 18 seasons
Woodson walks out a winner in final home game of his career
The brilliance of Charles Woodson
Charles Woodson has intercepted a pass in 18 consecutive seasons
Charles Woodson isn't the best NFL defensive player in history
Michigan football's Charles Woodson: Best photos through the years