Doug Fister vs. Zack Spencer — Career Comparison

Looking at the career totals, Doug Fister and Zack Spencer are fairly close on the surface numbers. Doug Fister posted stronger numbers in ERA (3.72 vs 7.04) and WHIP (1.267 vs 1.565). Zack Spencer had the advantage in home runs allowed (0 per nine innings vs 0.89). By the career numbers, Doug Fister 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.