William Parson vs. Dan Spillner — Career Comparison

Looking at the career totals, William Parson and Dan Spillner are fairly close on the surface numbers. Dan Spillner posted stronger numbers in ERA (4.21 vs 4.92) and WHIP (1.511 vs 1.856). William Parson had the advantage in home runs allowed (0.6 per nine innings vs 0.81). By the career numbers, Dan Spillner 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.