1. Bombers versus Completers [B/C]:
This category compares performance in yards per attempt versus completion percentage. If a passer is better at yards per attempt, he is a Bomber. If a passer is better at completion percentage, he is a Completer (and if he is really bad at yards per attempt while completing an okay amount, he is a Captain Checkdown).
2. Fun versus Safe [F/S]:
This relates back to the Fun QB Index. A passer who is better at throwing touchdowns than avoiding interceptions is “Fun”. A passer who is better at avoiding the interceptions is “Safe and Secure”.
3. Vulture versus Yard Eater [V/Y]:
Vulture is for TD Vulture. Vultures are passers who perform better at touchdown percentage than yards per attempt, while Yard Eaters perform better in the yards per attempt category, while others scored the touchdowns.
4. Gambler versus Holder [G/H]:
This category combines the completion percentage and interception indexes, and compares them to the sack rate index. A passer who avoids sacks at the expense of throwing a few more incompletions and interceptions is a Gambler. A passer who abides by the belief that “a sack isn’t the worst thing in the world” and is willing to hold the ball rather than put it up for grabs or risk a pass before a player is open is a Holder.