Steve Foster vs. Christian Roa — Career Comparison

Looking at the career totals, Steve Foster and Christian Roa are fairly close on the surface numbers. Christian Roa posted stronger numbers in ERA (0 vs 2.41) and home runs allowed (0 per nine innings vs 0.6). Steve Foster had the advantage in WHIP (1.193 vs 1.333). By the career numbers, Christian Roa 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.