Michael Kopech vs. Zack Spencer — Career Comparison

Looking at the career totals, Michael Kopech and Zack Spencer are fairly close on the surface numbers. Michael Kopech posted stronger numbers in ERA (4.14 vs 7.04) and WHIP (1.333 vs 1.565). Zack Spencer had the advantage in home runs allowed (0 per nine innings vs 1.45). By the career numbers, Michael Kopech 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.