 One of the NFL’s most formidable competitors, the AAFC attracted many of the nation’s best players, produced one of pro football’s greatest teams, and introduced many lasting innovations to the game.However, the AAFC was ultimately unable to sustain itself in competition with the NFL.A major factor in the league's demise was its domination by the Cleveland Browns, who compiled a four-year record of 52-4-3 and won all four AAFC titles.