Boof Bonser vs. Yilber Díaz — Career Comparison

On the career pitching numbers, Yilber Díaz posted a stronger line than Boof Bonser. Yilber Díaz posted stronger numbers in ERA (4.31 vs 5.18) and home runs allowed (0.86 per nine innings vs 1.36). By the career numbers, Yilber Díaz 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.