Rudy Arroyo vs. John Mackinson — Career Comparison

Looking at the career totals, Rudy Arroyo and John Mackinson are fairly close on the surface numbers. John Mackinson posted stronger numbers in WHIP (1.773 vs 2.057) and home runs allowed (1.23 per nine innings vs 1.54). Rudy Arroyo had the advantage in ERA (5.4 vs 7.36). 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.