Great stuff. I too look at those ERA and WAR rankings of individual pitchers and agree those numbers are meaningful.
Quite another story on the hitting side, where the Sox have just one guy, Betts, in the top 40 of AL hitters as measured by OPS or WAR (not OWAR). Thanks to his fielding prowess, he is 5th in the AL in WAR, but only 36th in OPS.
A year ago we had 6 of the top 40 AL hitters in individual OPS: Ortiz, Betts, HanRam, JBJ, Pedey, and Bogie. This precipitous drop must be because JF does not know how to do lineups.