[SirClintonPortis]

It's real simple. How many points and time of possession(and sometimes field position) has Hall provided FOR the Redskins vs how many points and/or time of possession Hall helped give to the opponent. Even if Hall doesn't "fully contribute" to a score or more ToP, he still partitially contributes on plays where he is involved. Picks are valuable, but if that same player is coughing up points or helping the opposing O extend drives, the player's net benefit to the team is not as high.

And really, the ultimate pinnacle for a CB is when he become "untouchable", a state in which opposing offenses won't EVEN try to test him because he causes a "failed play" for an offense so frequently. Hall certainly has not reached that level, and he's at the age where one can safely say he never will. And a shitty team around him is not an excuse. Nnamdi was not tested much in Oakland, despite their porous run D, terrible offense, and awful "culture".