Maybe that's the differentiation to make.
A grade on our list, but not quite on the AFL full team list.
eg. Riewoldt makes it to A grade as he was 4th highest averaging scorer last season, whereas Cotchin was 26th on the average possession list. Then again Deledio came in at 14 just below Judd at 12 only averaging half a possession a game less, so I would upgrade my previous grading of him.
To me it depends on where you make the cutoff point statistically for A grade, past performances and what "type" of player.
eg. forwards I'd cutoff quite high, top 5-10, Mids around the 20, Ruckmen 8, the taller Defenders I find harder to qualify as it's often a pure negating role.