"The most famous and recent cases are Tom Brady and Ben Roethlisberger.

Before those two, however, Jeff Hostetler with the New York Giants was a prime example.

And don't forget about what Kurt Warner did in St. Louis. After all, what list of backup quarterbacks assuming the starting role due to injury and improbably leading their teams deep into the playoffs would be complete without the former grocery store stock boy?

The mention of Warner is particularly appropriate, given what has transpired this week. After starring with the Rams, the likely future Hall of Famer extended his career with a couple of outstanding seasons in Arizona — at the expense of an inexperienced but touted young prospect out of Southern California with a broken collarbone named Matt Leinart."