Bold above .... please provide a link.FFS--I've posted it before. But, as you know, people believe what they want to believe.
The data is the data:
(1) Curves and screws get a 2-4 inch break horizontal break.
(2) Drop balls and curves generally get an average of a 5 inch break, with some kids getting a 8 or 9 inch vertical break. (Break is defined as ball movement *IN ADDITION* to that caused by gravity.)
(3) The vast majority of pitches did not have sufficient spin to make the ball move.
If you look at the data, the most important thing for kids to work on is *not* breaking pitches, but control and changing speeds. But, working on control is boring and repetitious--so, Daddies waste time trying to teach their kids four or five breaking pitches.