Atley Donald vs. John Halama — Career Comparison

On the career pitching numbers, Atley Donald posted a stronger line than John Halama. Atley Donald posted stronger numbers in ERA (3.52 vs 4.65) and WHIP (1.369 vs 1.474). By the career numbers, Atley Donald 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.