Brian O'Connor vs. John Wilson — Career Comparison

On the career pitching numbers, John Wilson posted a stronger line than Brian O'Connor. John Wilson posted stronger numbers in ERA (4.5 vs 5.11) and WHIP (1.750 vs 1.865). By the career numbers, John Wilson 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.