John Deering vs. William Parson — Career Comparison

On the career pitching numbers, John Deering posted a stronger line than William Parson. John Deering posted stronger numbers in ERA (3.8 vs 4.92) and WHIP (1.475 vs 1.856). By the career numbers, John Deering 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.