John Allen vs. Fred Hayner — Career Comparison

Looking at the career totals, John Allen and Fred Hayner are fairly close on the surface numbers. John Allen posted stronger numbers in WHIP (2.000 vs 3.000) and home runs allowed (0 per nine innings vs 4.5). Fred Hayner had the advantage in ERA (13.5 vs 18). By the career numbers, John Allen 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.