Dan Dumoulin vs. Phil Klein — Career Comparison

Looking at the career totals, Dan Dumoulin and Phil Klein are fairly close on the surface numbers. Phil Klein posted stronger numbers in ERA (5.5 vs 7.84) and WHIP (1.653 vs 2.613). Dan Dumoulin had the advantage in home runs allowed (0 per nine innings vs 1.46). By the career numbers, Phil Klein 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.