Check out this interesting article by John Lopez from si.com. I think he came up with this 26-27-60 rule himself – impressively thought out I have to say. The general idea is that QBs who have a 26 or higher on the Wonderlic, 27 college starts or more and a completion percentage of at least 60%, will succeed in the NFL. His examples of successful QBs who have met those numbers are compelling: Manning, Matt Ryan, Brees, Romo, Schaub, Rivers. (Check out Ryan Fitzpatrick’s Wonderlic score of 48…wow.) At the same time his list of those who did not have all 3 of these qualifiers was also compelling: Ryan Leaf, Joey Harrington, Akili Smith, Tim Couch, David Carr, JaMarcus Russell (among others). A few notable exceptions are Brett Favre (22 on Wonderlic) and Donovan McNabb (14 on Wonderlic) – and he doesn’t mention him, but our own Aaron Rodgers. Rodgers I believe falls short in the games started category – he started 22 games in college as far as I can tell. I believe he had a 35 on the Wonderlic and his completion percentage was 63.8%. So, technically, like Favre and McNabb, Rodgers would actually belong in Lopez’s loser category.
Not a perfect theory, but still not bad.