If the Price is Right did a "Name the Biggest Draft Bust in NFL History", Ryan Leaf would be in first place with 75% of the tally.
It wouldn't even be close. This douchebag, drug addicted nimrod is desperate to see another QB fail so his name is less associated with being an all time bust. In the event that Tua does flop, he still wouldn't come close to the epic screw up of even being compared to Peyton Manning.