Tony Arnold vs. Dellin Betances — Career Comparison

On the career pitching numbers, Dellin Betances posted a stronger line than Tony Arnold. Dellin Betances posted stronger numbers in ERA (2.53 vs 5.06) and WHIP (1.085 vs 1.685). By the career numbers, Dellin Betances 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.