William Bell vs. Tom Koehler — Career Comparison

On the career pitching numbers, William Bell posted a stronger line than Tom Koehler. William Bell posted stronger numbers in ERA (1.85 vs 4.39) and WHIP (1.353 vs 1.414). By the career numbers, William Bell 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.