Kei Igawa vs. Sonny Boy Jeffries — Career Comparison

On the career pitching numbers, Sonny Boy Jeffries posted a stronger line than Kei Igawa. Sonny Boy Jeffries posted stronger numbers in ERA (3.57 vs 6.66) and WHIP (1.412 vs 1.772). By the career numbers, Sonny Boy Jeffries 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.