Luis Ayala vs. Unknown Nelson — Career Comparison

Looking at the career totals, Luis Ayala and Unknown Nelson are fairly close on the surface numbers. Luis Ayala posted stronger numbers in ERA (3.34 vs 9) and WHIP (1.342 vs 2.000). Unknown Nelson had the advantage in home runs allowed (0 per nine innings vs 0.88). By the career numbers, Luis Ayala 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.