Al Severinsen vs. Ryan Zeferjahn — Career Comparison

Looking at the career totals, Al Severinsen and Ryan Zeferjahn are fairly close on the surface numbers. Al Severinsen posted stronger numbers in ERA (3.08 vs 4.14) and home runs allowed (0.57 per nine innings vs 1.46). Ryan Zeferjahn had the advantage in WHIP (1.365 vs 1.477). By the career numbers, Al Severinsen 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.