Grant Holmes vs. Mike O'Connor — Career Comparison

On the career pitching numbers, Grant Holmes posted a stronger line than Mike O'Connor. Grant Holmes posted stronger numbers in ERA (3.83 vs 5.3) and WHIP (1.298 vs 1.459). By the career numbers, Grant Holmes 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.