Sean Doolittle vs. Francis Jackson — Career Comparison

Looking at the career totals, Sean Doolittle and Francis Jackson are fairly close on the surface numbers. Sean Doolittle had the edge in ERA (3.2 vs 3.86). By the career numbers, Sean Doolittle 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.