The hall
The arms that defined the pitches.
Film filed
The clip belongs under the arm.
Teaching footage now files beside the craftsman when the rights posture is embed-only and the source is credited. The media stays at the source; the atlas gives it a shelf.
Nolan Ryan
Nolan Ryan on his four-seam and two-seam
Ryan in his own words on the two fastballs. The four-seam stays true and rides up on the hitter; the two-seam runs in on a righty and away from a lefty. It's the exact four/two split these specimen pages are built on, taught by the man who threw it.
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Mariano Rivera
Rivera teaches the cutter
Rivera walks Roy Halladay and Scott Kazmir through the cutter grip itself: hand to hand, one pitch passed down instead of flattened into a stat sheet.
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Paul Skenes
College aces show their grips
NCAA Baseball’s grip tour — Chase Dollander, Paul Skenes, Jac Caglianone and Rhett Lowder showing how they actually hold the ball.
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The masters
12 arms, filed in the order their eras began: 1928 to Jurrangelo Cijntje. Each card's band is the career laid against the same century; the longer the bar, the longer the arm lasted.
Carl Hubbell
Screwball
The screwball master who struck out five Hall of Famers in a row.
Bob Gibson
Slider
The most feared arm of his era, who pitched as though the plate were his to defend.
Phil Niekro
Knuckleball
The only knuckleballer to win 300 games: a Hall of Fame career built on the one pitch nobody, himself included, could fully explain.
Nolan Ryan
Four-seam fastball
Twenty-seven seasons, seven no-hitters, and a fastball he would not throw down the middle for anyone.
Roger Clemens
Split-finger fastball
The only pitcher with two twenty-strikeout games, built late on a splitter he called Mr. Splitty.
Greg Maddux
Two-seam fastball
The thinking pitcher: four straight Cy Youngs on command, deception, and a fastball that traded power for placement.
Mariano Rivera
Cutter
The greatest closer ever, built on one pitch he discovered by accident. The first player voted into the Hall of Fame unanimously.
Johan Santana
Circle changeup
A circle changeup widely called the best of its era, built entirely on looking exactly like the fastball.
Adam Wainwright
12-6 curveball
One curveball, one team, eighteen seasons: a big, slow hook so trusted it ended a pennant on a called strike three.
Cole Hamels
Circle changeup
A left-handed changeup artist whose out-pitch carried him to a World Series MVP: the southpaw answer to Santana.
Paul Skenes
Splinker
The modern phenom whose splinker, a pitch he found by accident, is already one of the best in baseball.
Jurrangelo Cijntje
Switch-pitching
The best two-armed arm the game has produced — an ace from the right side, a specialist from the left, carried in one body.
The legend
The gyroball
Bullet spin, zero Magnus
The pitch designed on a computer, mythologized into a monster, and quietly debunked by physics.
The gyroball is filed apart on purpose. It is a real pitch, but most of what is said about it is myth. We keep it to show the difference between a sourced record and a good story, and to label which is which.