 The Tennessee Titans returned to using navy blue jerseys as their third jersey, after a one-year hiatus in which they wore light blue Houston Oilers throwback jerseys in celebration of the 50th anniversary of the American Football League, but did not wear them for any game in 2010.The Pittsburgh Steelers wore their throwbacks against the Cleveland Browns on October 17 and against the New England Patriots on November 14.The Seattle Seahawks have retired the neon green uniform worn for one game in against Chicago, which was in turn an offshoot from an April Fools' Day joke written about by Uni Watch founder Paul Lukas that year.