Lefty Boone vs. Jimmy Nelson — Career Comparison

Looking at the career totals, Lefty Boone and Jimmy Nelson are fairly close on the surface numbers. Jimmy Nelson posted stronger numbers in ERA (4.12 vs 5.87) and WHIP (1.365 vs 1.638). Lefty Boone had the advantage in home runs allowed (0.2 per nine innings vs 0.94). By the career numbers, Jimmy Nelson 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.