John Campbell vs. Wilton Lopez — Career Comparison

Looking at the career totals, John Campbell and Wilton Lopez are fairly close on the surface numbers. John Campbell posted stronger numbers in ERA (0 vs 3.54) and home runs allowed (0 per nine innings vs 0.8). Wilton Lopez had the advantage in WHIP (1.323 vs 2.000). By the career numbers, John Campbell 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.