Drafting quarterbacks an inexact science

NFL coaches and scouts give the Zapruder-film treatment to any game tape involving quarterbacks they might draft. They scrutinize expression and inflection in every potential quarterback’s interview answer. Everything measureable gets measured. Perhaps no athletes in any sport get so thoroughly studied.

Why then do NFL teams let future Hall of Famer Tom Brady languish until the sixth round while spending high first-round picks on busts Akili Smith and Joey Harrington?