Jeff Karstens vs. Ciscero Warren — Career Comparison

Looking at the career totals, Jeff Karstens and Ciscero Warren are fairly close on the surface numbers. Jeff Karstens posted stronger numbers in ERA (4.44 vs 5) and WHIP (1.362 vs 1.600). Ciscero Warren had the advantage in home runs allowed (0 per nine innings vs 1.22). By the career numbers, Jeff Karstens 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.