Juan Alvarez vs. Unknown Nelson — Career Comparison

Looking at the career totals, Juan Alvarez and Unknown Nelson are fairly close on the surface numbers. Juan Alvarez posted stronger numbers in ERA (5.22 vs 9) and WHIP (1.657 vs 2.000). Unknown Nelson had the advantage in home runs allowed (0 per nine innings vs 1.79). By the career numbers, Juan Alvarez 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.