Manny Aybar vs. Shannon Withem — Career Comparison

Looking at the career totals, Manny Aybar and Shannon Withem are fairly close on the surface numbers. Shannon Withem posted stronger numbers in ERA (3 vs 5.11) and home runs allowed (0 per nine innings vs 1.13). Manny Aybar had the advantage in WHIP (1.522 vs 1.667). By the career numbers, Shannon Withem 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.