OK I remember now. It's not really the Stats per se, but what they call the "Ratings".
So BA, G, AB, R, etc. all of that is fine and dandy.
But then the Ratings sections asks for obscure things that might look like this, where the number in the parenthesis is a number from 1-10 for likelihood or whatnot:
Power (4) , H&R (6), Bunt (3) Runs (4), Range (9), Arm (8), PO (1238), AS (149), FA-1 (.993), FA-2 (.000)
I'm not even really sure what those last 4 are about. Fielding average? Pop Outs?
And how do I rank someone's Power or Arm? That's not in Baseball Reference (is it?). That's the stuff that left me scratching my head and sort of guessing and wishing I had access to that data.