Dae-Sung Koo vs. Bob Macdonald — Career Comparison

Looking at the career totals, Dae-Sung Koo and Bob Macdonald are fairly close on the surface numbers. Dae-Sung Koo posted stronger numbers in ERA (3.91 vs 4.34) and home runs allowed (0.78 per nine innings vs 1). Bob Macdonald had the advantage in WHIP (1.506 vs 1.565). By the career numbers, Dae-Sung Koo 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.