Don Mossi vs. Roy Witherup — Career Comparison

Looking at the career totals, Don Mossi and Roy Witherup are fairly close on the surface numbers. Don Mossi posted stronger numbers in ERA (3.43 vs 4.44) and WHIP (1.235 vs 1.454). Roy Witherup had the advantage in home runs allowed (0.17 per nine innings vs 0.91). By the career numbers, Don Mossi 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.