Grant Hartwig vs. Slim McGrew — Career Comparison

Looking at the career totals, Grant Hartwig and Slim McGrew are fairly close on the surface numbers. Grant Hartwig posted stronger numbers in ERA (5.14 vs 6.6) and WHIP (1.429 vs 1.900). Slim McGrew had the advantage in home runs allowed (0.3 per nine innings vs 0.86). By the career numbers, Grant Hartwig 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.