Don Aase vs. Fernando Valenzuela — Career Comparison

Fernando Valenzuela built a career as a starting pitcher and Don Aase as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Fernando Valenzuela led in home run suppression (HR9+ 110 vs 87), run prevention (ERA+ 95 vs 87), and skill-based run prevention (DICE+ 91 vs 88). Don Aase held the edge in strikeout rate (K%+ 90 vs 79). Keeping the role difference in mind, the edge still goes to Fernando Valenzuela.