big 56–21 victory, these particular Throwbacks were criticised as being very unattractive. During Sunday Night Football on NBC that week, Keith Olbermann named the Philadelphia Eagles the "Worst Persons in the NFL" for their blue-and-yellow throwback jerseys, citing "Throwbacks? Try throw-ups!" The blue and yellow uniforms, which are the same colors as the flag of the City of Philadelphia, were used by the Eagles, and their predecessors, the defunct Frankford Yellowjackets franchise, until the 1940s when the more familiar pre-Jeffrey Lurie era kelly green was introduced. The kelly green throwbacks from the 1960 season were wore for the 2010 season opener vs. the Green Bay Packers to commemorate the 50th anniversary of when the Eagles beat the Packers to win the 1960 NFL Championship. For the 2009 season, commemorating the 50th anniversary of the founding of the American Football League, the eight charter members of the AFL wore throwback uniforms from the early 1960s on select "Legacy Weekends." The Dallas Cowboys, also celebrating their 50th anniversary season, wore throwback jerseys for some games. The Packers, starting in 2010, introduced their 1929 throwback uniforms as their alternative uniform. Honoring the Packers first ever championship team in 1929, the uniform features a navy blue jersey with yellow numbers, with an added twist, as the uniforms in 1929 featured a small yellow circle in the front with a blue number in it. The circle and numbers were enlarged to meet current NFL uniform rules. Complementing the rest of the uniform were tan pants, replicating the canvas uniform pants used during the 1920s. The team switched to their 1940s uniforms for the 2015 season, which removed the yellow circle but retained the color scheme. In their 80th anniversary, the Pittsburgh Steelers released a throwback uniform that honored the 1934 team. The uniform was a gold and black horizontal-striped jersey white squares containing the numbers. The throwback uniform was worn twice during the regular season. and drew major media attention. USA Today said that the Steelers looked like "bumblebee[s] in a Depression-era chain gang." The NFL imposed a new rule for the 2013 season prohibiting the use of alternate colored helmets, eliminating many of the historically accurate throwback uniforms that had been in use up to that point. Teams are still allowed to use alternate decals (or no decals at all) for their throwbacks, but they must use them on the regular helmets. The one-helmet