John Flinn vs. Jack O'Connor — Career Comparison

Looking at the career totals, John Flinn and Jack O'Connor are fairly close on the surface numbers. John Flinn had the edge in ERA (4.17 vs 4.89). By the career numbers, John Flinn 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.