Mark Appel vs. Sean Doolittle — Career Comparison

Looking at the career totals, Mark Appel and Sean Doolittle are fairly close on the surface numbers. Mark Appel posted stronger numbers in ERA (1.74 vs 3.2) and home runs allowed (0 per nine innings vs 0.96). Sean Doolittle had the advantage in WHIP (1.045 vs 1.161). By the career numbers, Mark Appel 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.