Aaron Fletcher vs. John Mackinson — Career Comparison

On the career pitching numbers, John Mackinson posted a stronger line than Aaron Fletcher. John Mackinson posted stronger numbers in ERA (7.36 vs 9.15) and WHIP (1.773 vs 1.831). By the career numbers, John Mackinson 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.