Javier Lopez vs. Ethan Roberts — Career Comparison

On the career pitching numbers, Javier Lopez posted a stronger line than Ethan Roberts. Javier Lopez posted stronger numbers in ERA (3.48 vs 4.98) and WHIP (1.419 vs 1.592). By the career numbers, Javier Lopez 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.