I'd have to go with Bradford, 4,400 yards and 48 TDs vs 6 INTs is incredible. Here are the stats on the finalists and Harrell who got jipped out of an invite.
Sam Bradford (13 games) 4464 pass yards, 302/442 cmp/att, 68.3 %, 48 pass TDs, 6 ints
65 rush yards, 1.6 ypc, 5 rush TDs
Graham Harrell (12 games) 4747 pass yards, 406/568 cmp/att, 71.5 %, 41 pass TDs, 11 ints
-58 rush yards, -1.7 ypc, 6 rush TDs
Tim Tebow (13 games) 2515 pass yards, 174/268 cmp/att, 64.9 %, 28 pass TDs, 2 ints
564 rush yards, 3.7 ypc, 12 rush TDs
Colt McCoy (12 games) 3445 pass yards, 291/375 cmp/att, 77.6 %, 32 pass TDs, 7 ints
576 rush yards, 4.5 ypc, 10 rush TDs