Art Doll vs. Tom Koehler — Career Comparison

Looking at the career totals, Art Doll and Tom Koehler are fairly close on the surface numbers. Art Doll posted stronger numbers in ERA (3 vs 4.39) and home runs allowed (0.75 per nine innings vs 1.08). Tom Koehler had the advantage in WHIP (1.414 vs 1.667). By the career numbers, Art Doll 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.