Jeff Karstens vs. Walt Masterson — Career Comparison

Looking at the career totals, Jeff Karstens and Walt Masterson are fairly close on the surface numbers. Walt Masterson posted stronger numbers in ERA (4.15 vs 4.44) and home runs allowed (0.55 per nine innings vs 1.22). Jeff Karstens had the advantage in WHIP (1.362 vs 1.515). By the career numbers, Walt Masterson 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.