Arturo Lopez vs. Michael Roth — Career Comparison

On the career pitching numbers, Michael Roth posted a stronger line than Arturo Lopez. Michael Roth posted stronger numbers in ERA (8.5 vs 19.29) and WHIP (1.889 vs 4.286). By the career numbers, Michael Roth 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.