The franchise has won two NFL championships, both while it was based in Chicago. The first occurred in , but is the subject of controversy, with supporters of the Pottsville Maroons believing that Pottsville should have won the title. Their second title, and the first to be won in a championship game, came in , nearly two decades before the first Super Bowl. They returned to the title game to defend in 1948, but lost the rematch 7–0 in a snowstorm in Philadelphia.