sub 4 ERA? That’s like saying a batter hit above .250.
median team ERA during that period was a touch above 4, so that was a reliable no worse than average performance. Ion top of that, there were 2 or 3 years substantially better than that when he was in the league leaders. I would love that out of Corbin. Right now, it sure doesn't look like he's clearing the Gio bar.
