The Ryan Index attempts to answer baseball’s most impossible question: who was truly the hardest pitcher to hit in MLB history? The results don’t just crown Nolan Ryan — they expose how far behind even the legends really were.
By Rob Olds
The North Texas Sports Blog
August 12, 2026
Baseball has always measured greatness, but it has rarely measured difficulty. The Ryan Index was born from a simple question I couldn’t shake: Who was the hardest pitcher to hit in the history of Major League Baseball? Not the best. Not the most decorated. The hardest to hit. With the expansion of the Ryan Index dataset — now including strikeout‑to‑hit ratios, low‑hit game frequency, opponent OPS, durability profiles, and no‑contact rates — I can finally produce a single composite score that compares pitchers across eras, ballparks, rule changes, and offensive environments. This is the Ryan Index, a statistical formula that shows not only that Nolan Ryan was the toughest pitcher to hit, but just how much more unhittable he was than everyone else.
The Formula
The weighting model emphasizes the traits that define true pitching intimidation: Strikeout‑to‑Hit Ratio (30%), Low‑Hit Games (25%), Opponent OPS (20%), Durability (15%), and No‑Contact Rate (10%). Each category is normalized across the dataset, scaled era‑to‑era, and weighted into a final Ryan Index Score (RIS). Nolan Ryan’s score sets the benchmark at 100.0 — the summit every other pitcher climbs toward.
Ryan Index Scores (100 = Nolan Ryan Baseline)
Tier I — The Outlier Class
Nolan Ryan — 100.0 RIS The benchmark. The summit. The statistical anomaly.
Pedro Martinez — 91.4 RIS The greatest peak in MLB history. His strikeout‑to‑hit ratio and OPS suppression are second only to Ryan.
Randy Johnson — 89.7 RIS The closest thing the sport has seen to Ryan’s intimidation.
Jacob deGrom — 88.9 RIS The highest strikeout‑to‑hit ratio outside Ryan. Limited innings keep him from challenging for No. 2.
Sandy Koufax — 87.3 RIS The most dominant short‑window pitcher ever. His low‑hit game profile is historic.
Tier II — The Apex Predators
Max Scherzer — 84.6 RIS Modern power‑pitcher dominance: elite strikeout‑to‑hit ratio, elite OPS suppression, elite durability.
Gerrit Cole — 83.9 RIS The most consistent modern power pitcher. Sustained contact suppression keeps him high.
Chris Sale — 82.7 RIS Peak strikeout efficiency and no‑contact rate rival deGrom’s.
Roger Clemens — 81.2 RIS Longevity plus contact control. Durability score is elite.
J.R. Richard — 80.4 RIS Short‑career dominance with one of the strongest power profiles in the dataset.
Tier III — The Historical Titans
Tom Seaver — 77.8 RIS Balanced excellence across all categories.
Bob Gibson — 76.9 RIS OPS suppression and low‑hit games push him into elite historical territory.
Clayton Kershaw--76.5 RIS Elite pure contact prevention and whiff dominance over a long career.
Steve Carlton — 75.5 RIS Era‑defining workhorse. Durability score is top‑five.
Walter Johnson — 74.2 RIS The greatest pre‑integration pitcher. Durability unmatched.
Bob Feller — 73.8 RIS WWII‑era velocity outlier with a strong low‑hit game profile.
Tier IV — Power-Control Hybrids
Justin Verlander — 72.9 RIS Late‑career dominance and elite OPS suppression.
John Smoltz--72.1 RIS Strong strikeout-to-hit ratio, strong no contact rate, good OPS suppression.
Roy Halladay — 71.5 RIS Precision and durability define his profile.
Curt Schilling — 70.8 RIS Postseason dominance plus a strong strikeout‑to‑hit ratio.
Johan Santana — 69.9 RIS Peak contact suppression and elite OPS allowed.
David Cone — 68.7 RIS Versatile dominance with balanced component scores.
Tier V — The Historical Foundations Class
Vida Blue — 67.4 RIS Strong contact control and low‑SLG allowed.
Sam McDowell — 66.8 RIS Sneaky‑elite strikeout profile with strong K/H ratio.
Fergie Jenkins — 65.9 RIS Iron man durability and elite innings volume.
Don Drysdale — 64.7 RIS Era‑adjusted power suppression and strong low‑hit game frequency.
Dwight Gooden — 63.8 RIS Early‑career dominance produces a strong peak score.
Tier VI — The Contact Management Specialists
Yu Darvish — 62.7 RIS High strikeout percentage; inconsistent contact quality.
Ron Guidry --61.9 RIS His peak (1977-79) was historically elite, but his strikeout power and
durability pull his RIS down slightly.
Stephen Strasburg — 61.9 RIS Elite K%, limited durability.
Kerry Wood — 60.8 RIS High‑peak strikeout profile; durability score is low.
Nathan Eovaldi — 59.4 RIS Power arm with higher contact damage.
Bert Blyleven — 58.7 RIS Curveball‑driven weak contact; elite durability.
Tier VII -- Command-Based Dominance
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Don Sutton--47.3 RIS Accumulated K's through longevity, respectable number of low-hit games, no-contact
rate far below the elite tier.
Juan Marichel--46.9 RIS Excellent command, strong singles suppression, low slugging allowed, consistent
low-hit outings, but not a strikeout-dominant pitcher or a no-contact suppressor.
CC Sabathia--44.1 RIS Strong durability, solid strikeout profile, but held back by contact suppression
and quality-of-contact metrics.
Mike Mussina --41.7 RIS Exceptionally durable and consistently effective, but he did not suppress
contact, generate elite K rates, or avoid extra base damage.
Jim Palmer --39.8 RIS Excellence came from weak contact, command, and durability--not
strikeouts, no-contact dominance or hard-contact suppression at historic levels.
Gaylord Perry --38.9 RIS Succeeded through longevity, deception, and disruption--not dominance.
Greg Maddux --35.3 RIS His elite command and weak contact suppression can't overcome
a comparatively low strikeout-to-hit ratio, minimal low-hit game frequency, and a modest
no-contact rate.
Andy Pettitte --33.4 RIS He was durable, consistent, and a big-game pitcher; however, he was
not unhittable, overpowering, did not suppress contact, generate elite strikeouts, or limit hard
contact at a historic level.
Jack Morris --27.6 RIS Weak contact prevention, high singles allowed, low strikeout performance, more of a
workhorse pitcher than a dominance pitcher.
What the Scores Reveal
Nolan Ryan stands alone in the Ryan Index because no pitcher in the dataset matches the totality of his dominance across every pillar that defines true pitching difficulty. The numbers don’t just say he was great — they say he was categorically different from everyone who has ever taken a mound. Start with the most important component: strikeout‑to‑hit ratio. Ryan’s career K/H ratio of 1.46 is built on extremes no other pitcher sustained — 5,714 strikeouts against 3,923 hits allowed over 5,386 innings. Pedro Martinez, Randy Johnson, Chris Sale, and Jacob deGrom all challenge him in short bursts, but none combine that ratio with Ryan’s sheer volume. Ryan didn’t just miss bats; he erased them for nearly three decades.
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Then comes low‑hit game frequency, the category where Ryan becomes almost mythological. His 69 low‑hit games — including 7 no‑hitters, 12 one‑hitters, and 18 two‑hitters — form a statistical mountain range no one else approaches. Koufax, Feller, and Walter Johnson had legendary peaks, but Ryan’s ability to repeatedly produce games where hitters simply could not square him up is unmatched in baseball history. This is the category that exposes the gap between Ryan and everyone else: he didn’t just dominate seasons; he dominated individual nights at a rate no pitcher has ever replicated.
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Ryan’s OPS allowed (.606) is another pillar of his isolation. Even with high walk totals, hitters still posted one of the lowest cumulative OPS figures ever recorded against a pitcher with his workload. Pedro Martinez and Jacob deGrom produced lower OPS seasons, but neither sustained their suppression across 27 seasons, multiple eras, and wildly different offensive environments. Ryan’s ability to limit slugging — especially extra‑base hits — despite throwing harder than anyone of his era is a core reason his RIS sets the benchmark at 100.
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Durability is where Ryan becomes untouchable. His 5,386 innings, 27 seasons, and 215 double‑digit strikeout games create a longevity profile that no other power pitcher in history can even pretend to match. Walter Johnson threw more innings, but not with Ryan’s strikeout power. Clemens pitched nearly as long, but not with Ryan’s hit prevention. Randy Johnson and Scherzer had elite peaks, but not the endurance. Durability doesn’t just boost Ryan’s score — it amplifies every other category because he sustained his dominance for longer than any pitcher who ever relied on velocity and strikeouts.
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Finally, Ryan’s no‑contact rate (32.1%) — the percentage of plate appearances ending without the ball being put in play — is the hidden engine of his supremacy. Even modern strikeout machines like deGrom, Cole, and Sale don’t surpass Ryan once you factor in era normalization. Ryan generated swing‑and‑miss outcomes at a rate that simply shouldn’t exist for a pitcher who threw more innings than any power arm in history.
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When the Ryan Index weights all five pillars — strikeout‑to‑hit ratio, low‑hit games, OPS suppression, durability, and no‑contact rate — the result isn’t close. Ryan finishes with a perfect 100.0 RIS, and the next tier of legends (Pedro at 91.4, Johnson at 89.7, deGrom at 88.9, Koufax at 87.3) all fall short in at least one major category. Ryan is the only pitcher who is elite in every category and historically unmatched in two of them. The Index doesn’t just confirm his dominance; it mathematically isolates him. Nolan Ryan wasn’t merely the hardest pitcher to hit — he was the hardest pitcher to exist.
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What's Next For the Ryan Index
What’s next for the Ryan Index is expansion — and a lot of it. The North Texas Sports Blog will continue adding pitchers from every corner of baseball history and today’s game to deepen the model and sharpen its comparisons. That means folding in icons like John Smoltz, whose hybrid starter‑closer career offers a unique test case for the formula, as well as modern power arms like Hunter Greene, whose velocity and swing‑and‑miss profile will help calibrate how the Index handles emerging trends in pitching. As more pitchers are added, the Ryan Index will evolve into an even richer, era‑proof catalog of pitching difficulty — a living metric that grows with the game and continues to reveal just how rare true unhittability really is.
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NTSB North Texas Sports Blog
© 2026 North Texas Sports Blog | Feature written by Rob Olds at the NTSB Statisticians Desk
Statistical sources: Baseball Reference, StatMuse, Baseball Almanac
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