Brian O'Connor vs. John Riedling — Career Comparison

On the career pitching numbers, John Riedling posted a stronger line than Brian O'Connor. John Riedling posted stronger numbers in ERA (4.41 vs 5.11) and WHIP (1.536 vs 1.865). By the career numbers, John Riedling 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.