Kenny Roberts vs. Grant Thatcher — Career Comparison

Looking at the career totals, Kenny Roberts and Grant Thatcher are fairly close on the surface numbers. Grant Thatcher posted stronger numbers in ERA (3.16 vs 7.24) and WHIP (1.378 vs 1.829). Kenny Roberts had the advantage in home runs allowed (0 per nine innings vs 0.24). By the career numbers, Grant Thatcher 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.