J. D. Hammer vs. Unknown Phelps — Career Comparison

On the career pitching numbers, Unknown Phelps posted a stronger line than J. D. Hammer. Unknown Phelps posted stronger numbers in ERA (0 vs 4.38) and WHIP (0.750 vs 1.538). By the career numbers, Unknown Phelps 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.