Willie Hernandez vs. Frank Viola — Career Comparison

Frank Viola built a career as a starting pitcher and Willie Hernandez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Frank Viola led in walk avoidance (BB%+ 113 vs 88), strikeout rate (K%+ 114 vs 109), and skill-based run prevention (DICE+ 95 vs 91). Willie Hernandez held the edge in run prevention (ERA+ 100 vs 94). Keeping the role difference in mind, the edge still goes to Frank Viola.