Jamie Arnold vs. Don Heinkel — Career Comparison

Looking at the career totals, Jamie Arnold and Don Heinkel are fairly close on the surface numbers. Don Heinkel posted stronger numbers in ERA (4.74 vs 5.73) and WHIP (1.436 vs 1.652). Jamie Arnold had the advantage in home runs allowed (0.58 per nine innings vs 0.86). By the career numbers, Don Heinkel 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.