Well, again, IP is part of FIP, so you're good with FIP, but your issue with the fWAR for pitchers is the league adjustment they put in (AL vs NL) and the comparison to league average for the specific year the put in? We certainly can't say an NL pitcher in 2017 with a FIP of 3.00 is the same as an AL pitcher in 2017 with a FIP of 3.00 or either the same as a pitcher in either league in, say, 1970 with a FIP of 3.00.