Arturo Lopez vs. Ethan Roberts — Career Comparison

On the career pitching numbers, Ethan Roberts posted a stronger line than Arturo Lopez. Ethan Roberts posted stronger numbers in ERA (4.98 vs 19.29) and WHIP (1.592 vs 4.286). By the career numbers, Ethan Roberts 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.