John Anderson vs. Roy Heiser — Career Comparison

Looking at the career totals, John Anderson and Roy Heiser are fairly close on the surface numbers. John Anderson posted stronger numbers in WHIP (1.813 vs 2.647) and home runs allowed (1.21 per nine innings vs 1.59). Roy Heiser had the advantage in ERA (6.35 vs 6.45). By the career numbers, John Anderson 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.