Jason Hammel vs. Roy Witherup — Career Comparison

Looking at the career totals, Jason Hammel and Roy Witherup are fairly close on the surface numbers. Roy Witherup posted stronger numbers in ERA (4.44 vs 4.62) and home runs allowed (0.17 per nine innings vs 1.15). Jason Hammel had the advantage in WHIP (1.390 vs 1.454). By the career numbers, Roy Witherup 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.