Zack Spencer vs. Lewis Woolfolk — Career Comparison

Looking at the career totals, Zack Spencer and Lewis Woolfolk are fairly close on the surface numbers. Lewis Woolfolk posted stronger numbers in ERA (5.08 vs 7.04) and WHIP (1.506 vs 1.565). Zack Spencer had the advantage in home runs allowed (0 per nine innings vs 0.23). By the career numbers, Lewis Woolfolk 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.