People talk a lot about ERA. ERA is the one classic pitching statistic. The Nationals have the best ERA, and the Rockies have the worst ERA. All right!â†µ
But let’s examine this a little differently. The Nationals’ pitching staff has allowed a .290 OBP, and a .351 slugging percentage. The Rockies’ pitching staff has allowed a .367 OBP, and a .492 slugging percentage. Against the Rockies, batters have hit like 2012 Jason Heyward. Against the Nationals, batters have hit like 2012 Yunel Escobar. Oh dear!