William Parson vs. Erik Plantenberg — Career Comparison

On the career pitching numbers, Erik Plantenberg posted a stronger line than William Parson. Erik Plantenberg posted stronger numbers in ERA (4.46 vs 4.92) and WHIP (1.701 vs 1.856). By the career numbers, Erik Plantenberg 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.