Ronald Bolanos vs. John Mitchell — Career Comparison

On the career pitching numbers, John Mitchell posted a stronger line than Ronald Bolanos. John Mitchell posted stronger numbers in ERA (4.35 vs 5.25) and WHIP (1.550 vs 1.646). By the career numbers, John Mitchell 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.