Las Vegas Raiders' guard Richie Incognito announces NFL retirement
Richie Incognito retires after turbulent 15-year NFL career
Richie Incognito says he's retiring, liver and kidneys 'shutting down'
Bills' Richie Incognito retires because his 'liver and kidneys are
Richie Incognito, Former Rams Draft Pick, Retires After
Raiders sign Richie Incognito to 1-year deal
Richie Incognito to retire from Buffalo Bills, he claims on Twitter
Buffalo Bills Ex Richie Incognito Retires After Controversial NFL
Buffalo Bills Ex Richie Incognito Retires After Controversial NFL