Tom Bolton vs. Jack Killilay — Career Comparison

On the career pitching numbers, Jack Killilay posted a stronger line than Tom Bolton. Jack Killilay posted stronger numbers in ERA (3.54 vs 4.56) and home runs allowed (0 per nine innings vs 0.77). By the career numbers, Jack Killilay 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.