Jose Diaz vs. Billy Milligan — Career Comparison

On the career pitching numbers, Billy Milligan posted a stronger line than Jose Diaz. Billy Milligan posted stronger numbers in ERA (4.81 vs 9.39) and WHIP (1.672 vs 2.609). By the career numbers, Billy Milligan 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.