Ok, I guess that makes a little more sense. As I said in an earlier post, I'm not sure that I understand fip completely. Every explanation of it that I heard of it up until now, pretty much stated that it takes out all fielding plays and only accounts for BBs, Ks, and HRs. Your post, if I'm understanding correctly, makes it sound like that's not the case. It isn't taking the plays out, it is assuming a completely average number of them are made. The good thing about xFIP is that it correlates well from year to year. You are basically pulling all of the luck out of ERA. The bad part is it doesn't take into account things like GB%, pitchers who have above average LOB% year after year etc. qERA is a little better version of FIP that does include GB% but I haven't found a place to get that stat on a regular basis. This entire branch of stats is relatively new and they are doing a lot of work on it but it has been shown that you can predict future success better by looking at stats like K/9 than you could by looking at ERA. ERA is extremely luck based.