Jeff Marquez vs. Harley Parker — Career Comparison

Looking at the career totals, Jeff Marquez and Harley Parker are fairly close on the surface numbers. Jeff Marquez posted stronger numbers in ERA (5.4 vs 5.9) and WHIP (1.400 vs 1.749). Harley Parker had the advantage in home runs allowed (0.33 per nine innings vs 1.8). By the career numbers, Jeff Marquez 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.