John Firth vs. William Zay — Career Comparison

On the career pitching numbers, John Firth posted a stronger line than William Zay. John Firth posted stronger numbers in ERA (8 vs 9) and WHIP (2.111 vs 4.000). By the career numbers, John Firth 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.