Mark Clark vs. Jonathan Heasley — Career Comparison

On the career pitching numbers, Mark Clark posted a stronger line than Jonathan Heasley. Mark Clark posted stronger numbers in ERA (4.61 vs 5.89) and WHIP (1.406 vs 1.475). By the career numbers, Mark Clark 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.