Kyle Peterson vs. Ciscero Warren — Career Comparison

Looking at the career totals, Kyle Peterson and Ciscero Warren are fairly close on the surface numbers. Kyle Peterson posted stronger numbers in ERA (4.71 vs 5) and WHIP (1.516 vs 1.600). Ciscero Warren had the advantage in home runs allowed (0 per nine innings vs 0.59). By the career numbers, Kyle Peterson 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.