Paul Castner vs. Frank Mulroney — Career Comparison

On the career pitching numbers, Frank Mulroney posted a stronger line than Paul Castner. Frank Mulroney posted stronger numbers in ERA (3 vs 6.3) and WHIP (1.000 vs 1.900). By the career numbers, Frank Mulroney 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.