Greg Bollo vs. Dan Dumoulin — Career Comparison

Looking at the career totals, Greg Bollo and Dan Dumoulin are fairly close on the surface numbers. Greg Bollo posted stronger numbers in ERA (3.34 vs 7.84) and WHIP (1.079 vs 2.613). Dan Dumoulin had the advantage in home runs allowed (0 per nine innings vs 1.52). By the career numbers, Greg Bollo 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.