Clay Christiansen vs. Brian O'Connor — Career Comparison

Looking at the career totals, Clay Christiansen and Brian O'Connor are fairly close on the surface numbers. Clay Christiansen posted stronger numbers in WHIP (1.603 vs 1.865) and home runs allowed (0.93 per nine innings vs 1.46). Brian O'Connor had the advantage in ERA (5.11 vs 6.05). By the career numbers, Clay Christiansen 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.