Jhonathan Diaz vs. Ray Herbert — Career Comparison

On the career pitching numbers, Ray Herbert posted a stronger line than Jhonathan Diaz. Ray Herbert posted stronger numbers in ERA (4.01 vs 4.66) and WHIP (1.388 vs 1.705). By the career numbers, Ray Herbert had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.