Alek Jacob vs. John Shaffer — Career Comparison

Looking at the career totals, Alek Jacob and John Shaffer are fairly close on the surface numbers. Alek Jacob posted stronger numbers in ERA (4.06 vs 4.57) and WHIP (1.216 vs 1.492). John Shaffer had the advantage in home runs allowed (0.15 per nine innings vs 1.24). By the career numbers, Alek Jacob 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.