Satchel Paige demonstrates four of his favorite pitches to The Baltimore Afro-American, 1948:
The sidearm curve (outshoot): “A wrist-twist causes counter-clockwise spin which makes the ball bend away from a right-handed batter.”
Sidearm Curve–outshoot
The overhand curve (drop): “Is gripped and thrown with a twist as to let the ball leave the hand with a snap between thumb and forefinger. Overspin thus makes ball take a sudden dip.”
Overhand curve–drop
The Screwball (inshoot): “Ball slides off fingers with a rapid clockwise spin, making it twist away from a left-handed hitter.”
Screwball–inshoot
The knuckleball: “takes odd twists and turns even the pitcher can’t predict.”
Knuckle ball
“May every page you turn be a Satchel Paige.” Greg Proops, The Smartest Man in the World Podcast.
Baseball History Daily 
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