Mark Leiter vs. Jim Mains — Career Comparison

Looking at the career totals, Mark Leiter and Jim Mains are fairly close on the surface numbers. Mark Leiter posted stronger numbers in ERA (4.57 vs 5.63) and WHIP (1.412 vs 1.500). Jim Mains had the advantage in home runs allowed (0 per nine innings vs 1.18). By the career numbers, Mark Leiter 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.