Jhonathan Diaz vs. Scott Olsen — Career Comparison

Looking at the career totals, Jhonathan Diaz and Scott Olsen are fairly close on the surface numbers. Jhonathan Diaz posted stronger numbers in ERA (4.66 vs 4.85) and home runs allowed (0.78 per nine innings vs 1.34). Scott Olsen had the advantage in WHIP (1.512 vs 1.705). By the career numbers, Jhonathan 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.