Brian O'Connor vs. J. C. Romero — Career Comparison

On the career pitching numbers, J. C. Romero posted a stronger line than Brian O'Connor. J. C. Romero posted stronger numbers in ERA (4.16 vs 5.11) and WHIP (1.582 vs 1.865). By the career numbers, J. C. Romero 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.