Thomas Hatch vs. George Perez — Career Comparison

Looking at the career totals, Thomas Hatch and George Perez are fairly close on the surface numbers. George Perez posted stronger numbers in WHIP (1.560 vs 1.621) and home runs allowed (1.08 per nine innings vs 1.4). Thomas Hatch had the advantage in ERA (5.24 vs 5.4). By the career numbers, George Perez 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.