Emmett O'Neill vs. Unknown Thompson — Career Comparison

On the career pitching numbers, Unknown Thompson posted a stronger line than Emmett O'Neill. Unknown Thompson posted stronger numbers in ERA (2 vs 4.76) and WHIP (1.222 vs 1.709). By the career numbers, Unknown Thompson 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.