[SayHey1]

There's a pretty good explanation of the stat over at FanGraphs - https://library.fangraphs.com/defense/catcher-defense/

As for what to consider good, bad, etc, I can't really say with certainty what formula OOTP uses to but I looked at my fictional league (50+ yrs history) to see what kind of numbers the top catchers were putting up and the best were in the range they mentioned, 15 - 25.

So I'd say that's a good starting point to create working scale of reference.

Hope that helps some.

Yes! Thanks so much.