Guys like Leaf and Jamarcus were overrated and/or overdrafted and didn't really last long enough to say they were continually overpaid. Guys like Sanchez and Cutler at least provided some measure of worth to their team compared to Bradford. Lifetime earnings vs lifetime production, make guys like Sanchez and Cutler look like bargains
$ per passing yard
$3,478 Cutler
$4,833 Sanchez
$6,685 Bradford
$ per completion
$40,090 Cutler
$56,486 Sanchez
$70,093 Bradford
$ per TD pass
$538,308 Cutler
$863,067 Sanchez
$1,262,357 Bradford
$ per Win
$1.6 million Cutler
$2.0 million Sanchez
$3.8 million Bradford
It can be argued if a player plays up to their worth or their contract, but I don't think there is another player that has continually been overpaid during their career quite like Sam Bradford. He still made $15 million last year for playing 3 games. He is the undisputed champ of the NFL overpaid.