Jack Leiter vs. Don Mossi — Career Comparison

On the career pitching numbers, Don Mossi posted a stronger line than Jack Leiter. Don Mossi posted stronger numbers in ERA (3.43 vs 4.8) and WHIP (1.235 vs 1.361). By the career numbers, Don Mossi 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.