Jose Mercedes vs. Zack Spencer — Career Comparison

Looking at the career totals, Jose Mercedes and Zack Spencer are fairly close on the surface numbers. Jose Mercedes posted stronger numbers in ERA (4.75 vs 7.04) and WHIP (1.455 vs 1.565). Zack Spencer had the advantage in home runs allowed (0 per nine innings vs 1.16). By the career numbers, Jose Mercedes 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.