Charlie Butler vs. Matt Foster — Career Comparison

Looking at the career totals, Charlie Butler and Matt Foster are fairly close on the surface numbers. Matt Foster posted stronger numbers in ERA (4.3 vs 9) and WHIP (1.274 vs 3.000). Charlie Butler had the advantage in home runs allowed (0 per nine innings vs 1.36). By the career numbers, Matt Foster 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.