Kevin Appier vs. Derek Thompson — Career Comparison

Looking at the career totals, Kevin Appier and Derek Thompson are fairly close on the surface numbers. Derek Thompson posted stronger numbers in ERA (3.5 vs 3.74) and home runs allowed (0 per nine innings vs 0.8). Kevin Appier had the advantage in WHIP (1.314 vs 1.500). By the career numbers, Derek 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.