Billy Milligan vs. Zac Rosscup — Career Comparison

On the career pitching numbers, Billy Milligan posted a stronger line than Zac Rosscup. Billy Milligan posted stronger numbers in ERA (4.81 vs 5.09) and home runs allowed (0.47 per nine innings vs 1.66). 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.