I'm not going by just FIP though, I'm also looking at the xStats versions which do account for how hard hit it is. No composite ERA stat gets him under a 3.50, if one is an outlier sometimes it is the others missing something on a pitcher, when they all say a certain level it is almost never sustainable. ERA takes almost 3 years of data to become meaningful, it just isn't a stat people should be using for evaluating players in a single season.