Jeff Heathcock vs. Dae-Sung Koo — Career Comparison

On the career pitching numbers, Jeff Heathcock posted a stronger line than Dae-Sung Koo. Jeff Heathcock posted stronger numbers in ERA (3.76 vs 3.91) and WHIP (1.234 vs 1.565). By the career numbers, Jeff Heathcock 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.