A: Plays very strong at any game (8 ball, 9 ball, One Pocket, Banks, or 14.1) consistently, both offensively, and defensively. Has a very strong mental game, and is very smart, and knows how he is going to play each shot, and in which pocket, before getting down on the 1st shot.
B: Plays pretty good, and has a nice stroke. May not have that strong of a mental game, and is not always very consistent. Plays very good, but does not have all of the knowledge of the A player, or the consistency of the A player, but does have off and on spirts where he can play just as strong as the A player, but just not as consistent.
C: Plays decent, and might have a decent stroke, but still has a lot to learn. Very inconsistent.
D: Banger level. Does not have a decent bridge, or a decent stance when getting down on the ball, and does not care about position play. Only thinks about the shot he is shooting at, and does not think defensively.