Jose Diaz vs. Rafael Valdez — Career Comparison

Looking at the career totals, Jose Diaz and Rafael Valdez are fairly close on the surface numbers. Jose Diaz posted stronger numbers in ERA (9.39 vs 11.12) and home runs allowed (2.35 per nine innings vs 6.35). Rafael Valdez had the advantage in WHIP (2.294 vs 2.609). By the career numbers, Jose Diaz 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.