Bob Blewett vs. Rafael Perez — Career Comparison

Looking at the career totals, Bob Blewett and Rafael Perez are fairly close on the surface numbers. Rafael Perez posted stronger numbers in ERA (3.64 vs 4.82) and WHIP (1.380 vs 1.643). Bob Blewett had the advantage in home runs allowed (0 per nine innings vs 0.71). By the career numbers, Rafael 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.