Jason Grilli vs. Unknown Henderson — Career Comparison

Looking at the career totals, Jason Grilli and Unknown Henderson are fairly close on the surface numbers. Jason Grilli posted stronger numbers in ERA (4.22 vs 72) and WHIP (1.405 vs 9.000). Unknown Henderson had the advantage in home runs allowed (0 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.