Fred Hayner vs. Billy McCool — Career Comparison

On the career pitching numbers, Billy McCool posted a stronger line than Fred Hayner. Billy McCool posted stronger numbers in ERA (3.59 vs 13.5) and WHIP (1.467 vs 3.000). By the career numbers, Billy McCool 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.