 The difference between the 2004 throwback and the 2010 throwback is the helmet color, which reverses the 2004 scheme.The Arizona Cardinals, who were the only team to not wear a third jersey in any form since the NFL allowed third jerseys in , unveiled a black third jersey to be worn in 2010.The Philadelphia Eagles have adopted their championship uniforms that were worn September 12 against the Packers, the team they beat to win their last championship in celebration of the 50th anniversary of that game.