Unknown Phelps vs. Jeff Plympton — Career Comparison

Looking at the career totals, Unknown Phelps and Jeff Plympton are fairly close on the surface numbers. Unknown Phelps had the edge in WHIP (0.750 vs 1.688). 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.