Humberto Robinson vs. Mark Williamson — Career Comparison

Looking at the career totals, Humberto Robinson and Mark Williamson are fairly close on the surface numbers. Humberto Robinson had the edge in ERA (3.25 vs 3.86). By the career numbers, Humberto Robinson 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.