What is it?
Under the assumption that football could be watched and enjoyed in the spring and summer time, the United States Football League was founded in 1982. Their goal was to provide a springtime alternative to compete directly with the NFL.UR: -15

Why is it underrated?
Like the Canadian Football League, the USFL wound up being a proving ground for a lot of future NFL stars. But more than that, it influenced a lot of future NFL rules and trends.