William Parson vs. Al Preston — Career Comparison

On the career pitching numbers, William Parson posted a stronger line than Al Preston. William Parson posted stronger numbers in ERA (4.92 vs 20.25) and WHIP (1.856 vs 4.500). By the career numbers, William Parson 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.