Michael Mercado vs. Ben Rivera — Career Comparison

On the career pitching numbers, Ben Rivera posted a stronger line than Michael Mercado. Ben Rivera posted stronger numbers in ERA (4.52 vs 11.81) and WHIP (1.489 vs 2.250). By the career numbers, Ben Rivera 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.