Zach Jackson vs. Tony Welzer — Career Comparison

Looking at the career totals, Zach Jackson and Tony Welzer are fairly close on the surface numbers. Tony Welzer posted stronger numbers in ERA (4.78 vs 5.81) and home runs allowed (0.43 per nine innings vs 1.28). Zach Jackson had the advantage in WHIP (1.566 vs 1.626). By the career numbers, Tony Welzer 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.