Dave Heaverlo vs. Unknown Nelson — Career Comparison

Looking at the career totals, Dave Heaverlo and Unknown Nelson are fairly close on the surface numbers. Dave Heaverlo posted stronger numbers in ERA (3.41 vs 9) and WHIP (1.492 vs 2.000). Unknown Nelson had the advantage in home runs allowed (0 per nine innings vs 0.69). By the career numbers, Dave Heaverlo 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.