Luarbert Arias vs. Unknown Nelson — Career Comparison

On the career pitching numbers, Unknown Nelson posted a stronger line than Luarbert Arias. Unknown Nelson posted stronger numbers in ERA (9 vs 11.32) and WHIP (2.000 vs 2.129). By the career numbers, Unknown 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.