Unknown Blackburn vs. Addie Joss — Career Comparison

Looking at the career totals, Unknown Blackburn and Addie Joss are fairly close on the surface numbers. Unknown Blackburn had the edge in ERA (0.9 vs 1.89). By the career numbers, Unknown Blackburn 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.