Mario Hollands vs. Jim Peterson — Career Comparison

On the career pitching numbers, Mario Hollands posted a stronger line than Jim Peterson. Mario Hollands posted stronger numbers in ERA (4.4 vs 5.27) and WHIP (1.447 vs 1.665). By the career numbers, Mario Hollands 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.