Mason Black vs. George Jefferson — Career Comparison

On the career pitching numbers, George Jefferson posted a stronger line than Mason Black. George Jefferson posted stronger numbers in ERA (2.92 vs 6.47) and WHIP (1.287 vs 1.636). By the career numbers, George Jefferson 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.