Frank Hafner vs. Esmerling Vasquez — Career Comparison

On the career pitching numbers, Esmerling Vasquez posted a stronger line than Frank Hafner. Esmerling Vasquez posted stronger numbers in ERA (4.86 vs 7) and WHIP (1.559 vs 2.222). By the career numbers, Esmerling Vasquez 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.