Fred Hayner vs. Josias Manzanillo — Career Comparison

On the career pitching numbers, Josias Manzanillo posted a stronger line than Fred Hayner. Josias Manzanillo posted stronger numbers in ERA (4.71 vs 13.5) and WHIP (1.471 vs 3.000). By the career numbers, Josias Manzanillo 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.