there is no bigger fan here but I think he's really messed up - both his mechanics and his approach, at the very least move him down for his own sake; see if he can figure things out
so they're making roster decision (Schneider vs Biggio) based on analytics. Hopefully they have another stat showing how successful those roster decisions are
.... had a quick look, xERA is just xwOBA converted to the ERA scale, it contains/measures the amount and quality of contact. There's alot of noise in ERA