Michael Mercado vs. Billy Norman — Career Comparison

On the career pitching numbers, Billy Norman posted a stronger line than Michael Mercado. Billy Norman posted stronger numbers in ERA (3.4 vs 11.81) and WHIP (1.248 vs 2.250). By the career numbers, Billy Norman 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.