Rick Aguilera vs. William Parson — Career Comparison

Looking at the career totals, Rick Aguilera and William Parson are fairly close on the surface numbers. Rick Aguilera posted stronger numbers in ERA (3.57 vs 4.92) and WHIP (1.259 vs 1.856). William Parson had the advantage in home runs allowed (0.6 per nine innings vs 0.96). By the career numbers, Rick Aguilera 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.