Dan Jennings vs. John McDonald — Career Comparison

Looking at the career totals, Dan Jennings and John McDonald are fairly close on the surface numbers. Dan Jennings posted stronger numbers in ERA (3.1 vs 9) and WHIP (1.486 vs 2.333). John McDonald had the advantage in home runs allowed (0 per nine innings vs 0.65). By the career numbers, Dan Jennings 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.