John Johnstone vs. Greg Mullins — Career Comparison

On the career pitching numbers, Greg Mullins posted a stronger line than John Johnstone. Greg Mullins posted stronger numbers in ERA (0 vs 4.01) and WHIP (1.000 vs 1.455). By the career numbers, Greg Mullins 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.