Loopers xFIP was more or less exactly the same as the 5 previous seasons, his peripherals didn't change just randomness in ERA did. His 5 year run of xFIP is now... 4.85 4.33 4.93 4.59 4.90 He is a 4.50-5.00 ERA type so no big loss, but to say that last year he was somehow much worse than previous years just isn't true. As for Doug Davis, he isn't a very good pitcher. He is basically Suppan right before we signed him, same basic peripherals(more K, more BB of course but same composite ERA). His xFIP pattern is 4.91, 4.72, 4.46, 4.78 the past 4 years. Davis has had a lot of luck stranding runners which might just be random, might be that he is one of the rare players who have a skill for it. Riske was one of those rare types too and that didn't work out so well, usually it is just luck or playing on teams with good RP. If we are signing Davis for significantly more than we would have given Looper it isn't helping the team at all. He is probably a little better but not by much. Using ERA to talk about how good or bad a pitcher is, is about the same as using RBI or AVG for hitters. A good defense, good bullpen, pitchers park, easier division etc is going to have a huge effect on ERA. It is a team stat, not an individual one.