Roy Heiser vs. Al Mahon — Career Comparison

Looking at the career totals, Roy Heiser and Al Mahon are fairly close on the surface numbers. Roy Heiser posted stronger numbers in ERA (6.35 vs 22.85) and WHIP (2.647 vs 4.154). Al Mahon had the advantage in home runs allowed (0 per nine innings vs 1.59). By the career numbers, Roy Heiser 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.