Isidro Marquez vs. John Morris — Career Comparison

On the career pitching numbers, John Morris posted a stronger line than Isidro Marquez. John Morris posted stronger numbers in ERA (3.95 vs 6.75) and WHIP (1.420 vs 1.650). By the career numbers, John Morris 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.