Mike Couchee vs. Edwin Diaz — Career Comparison

Looking at the career totals, Mike Couchee and Edwin Diaz are fairly close on the surface numbers. Edwin Diaz posted stronger numbers in ERA (2.82 vs 5.14) and WHIP (1.053 vs 1.357). Mike Couchee had the advantage in home runs allowed (0.64 per nine innings vs 0.94). By the career numbers, Edwin Diaz 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.