Mark Hamburger vs. Brian O'Connor — Career Comparison

On the career pitching numbers, Mark Hamburger posted a stronger line than Brian O'Connor. Mark Hamburger posted stronger numbers in ERA (4.5 vs 5.11) and WHIP (1.000 vs 1.865). By the career numbers, Mark Hamburger 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.