John Fischer vs. Jack O'Connor — Career Comparison

On the career pitching numbers, John Fischer posted a stronger line than Jack O'Connor. John Fischer posted stronger numbers in ERA (3.73 vs 4.89) and WHIP (1.268 vs 1.657). By the career numbers, John Fischer 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.