Jeremy Affeldt vs. Tyler Robertson — Career Comparison

On the career pitching numbers, Jeremy Affeldt posted a stronger line than Tyler Robertson. Jeremy Affeldt posted stronger numbers in ERA (3.97 vs 5.54) and WHIP (1.448 vs 1.500). By the career numbers, Jeremy Affeldt 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.