Jason Grilli vs. Jimmie Keenan — Career Comparison

Looking at the career totals, Jason Grilli and Jimmie Keenan are fairly close on the surface numbers. Jason Grilli posted stronger numbers in ERA (4.22 vs 6.37) and WHIP (1.405 vs 1.896). Jimmie Keenan had the advantage in home runs allowed (0.76 per nine innings vs 1). By the career numbers, Jason Grilli 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.