Jack Leiper vs. Brian O'Connor — Career Comparison

Looking at the career totals, Jack Leiper and Brian O'Connor are fairly close on the surface numbers. Jack Leiper posted stronger numbers in WHIP (1.778 vs 1.865) and home runs allowed (0.6 per nine innings vs 1.46). Brian O'Connor had the advantage in ERA (5.11 vs 5.4). By the career numbers, Jack Leiper 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.