Starting quarterback Tom Brady will miss four games, but the New England Patriots are confident Jimmy Garoppolo, above, has the mental aptitude to handle the job. Jared Wickerham/Getty ImagesMental aptitude is one of the critical traits the Patriots covet in their quarterbacks, and though few can match Brady -- who former assistant coach Bill O'Brien once dubbcheap football jerseysed "IBM" because of his uncanny recall and ability to store cheap football jerseys data -- Garoppolo has shown early signs of pote