Isidro Marquez vs. Erick Threets — Career Comparison

Looking at the career totals, Isidro Marquez and Erick Threets are fairly close on the surface numbers. Erick Threets posted stronger numbers in ERA (3.28 vs 6.75) and home runs allowed (0.36 per nine innings vs 4.05). Isidro Marquez had the advantage in WHIP (1.650 vs 1.703). By the career numbers, Erick Threets 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.