Carlos Frias vs. Carson Spiers — Career Comparison

On the career pitching numbers, Carlos Frias posted a stronger line than Carson Spiers. Carlos Frias posted stronger numbers in ERA (4.5 vs 5.69) and WHIP (1.395 vs 1.573). By the career numbers, Carlos Frias 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.