20. Kurt Warner

If there was ever an “Arena League” version of this list, then Warner would surely be profiled there as well, for his starring role as the Iowa Barnstormers’ quarterback playing indoor pro football. Warner’s rags-to-riches story is one unique in the annals of the NFL, and certainly improbable in it produced one of the NFL’s all-time great gunslingers.

Before Brady and Manning had fully established themselves, Warner was the dominant QB of the early 2000’s, leading the “Greatest Show on Turf,” the then-St. Louis Rams to two Super Bowls, wining XXXIV versus the Titans.

Perhaps an even greater testament to Warner’s superior skills is that he actually took the forever mediocre Arizona Cardinals’ franchise to Super Bowl XLIII, nearly upsetting the Steelers in the process.