Francis Jackson vs. Ethan Roberts — Career Comparison

On the career pitching numbers, Francis Jackson posted a stronger line than Ethan Roberts. Francis Jackson posted stronger numbers in ERA (3.86 vs 4.98) and WHIP (1.071 vs 1.592). By the career numbers, Francis Jackson 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.