Hall Of Fame quarterback Kurt Warner’s story has been well-chronicled, going from undrafted free agent to stocking shelves at a grocery store to Super Bowl champion and ultimately, Canton. If anybody has insights on NFL quarterback battles, it’s him. He famously took over for an injured Trent Green in the 1999 season, piloting the great “The Greatest Show on Turf” offense to a Super Bowl title, while also garnering SB MVP. After his Rams’ career, he signed with the Giants in 2004, and was named the starter, ahead of first-rounder Eli Manning, who was part of the famed draft which also saw Pittsburgh select their own future Hall Of Famer in Ben Roethlisberger.