We have Trackman and Rapsodo in our facility to measure spin rate and directionality. There's a lot more to spin rate than just the gross number. It's a fairly complicated topic and as people have noted, I've written a lot about it on my blog.
I'll tell you a good way to manipulate spin rate: Pine tar or firm grip. Give it a shot and measure it. Then report back 
Kyle, remember we had this conversation about a year ago. Thought of some ways to reduce spin rate but increasing it - a lot tougher. Have you guys come up with anything since then?
I don't think the physics of producing spin are unknown, but rather how such physics get introduced into a pitching motion on a generic basis. For instance, someone mentioned laying the wrist back and then advancing that joint (flicking) ahead of arm speed. That should produce additional spin (assuming other things don't change). Reality is that laying back the wrist further than one currently does will 99% of the time change other things in the delivery, for good or bad or simply different. Its kind on like handing over a baseball and a couple 18 yo kids to a physicist and telling him to create the perfect pitching motion. They will go to the drawing board and figure out the "angles" and come back and instruct the kids how to throw. Some will be better than others as the mechanics will fit better, but the physicist is someone who can then tinker with these guys and improve their pitching by going against the optimum path that came from the drawing board. I think if you delivered your kid to Kyle and asked for some additional RPM - while not backsliding on any other aspects such a MPH or command - Kyle could probably tweak based on this one individual.
2017LHP has some high spin. He does have longer fingers and a fluid motion which I believe helps everything catch up (gives himself time for wrist and fingers to accelerate past the arm). I have wondered about what Kyle said concerning pine tar or grip. I have always wondered if professional pitchers have any type of "skin care" regiment when it comes to their hands. 2017LHP doesn't even go the his mouth in February when it is below 40 degrees and swears pitching in 40 degree weather is not much different from 80 degree weather when it comes to gripping the ball. My fingertips are like a bowling ball when it gets down to 40. I'm thinking a kid's natural skin "texture" (not exactly sure what term to use) may have some influence on pitching. Think about some kid that maybe has a job swinging a hammer or simply loves BP and develops some tough skin. Doesn't this tough skin simply have less stick to the ball and allow the ball to slip out just before the very ends of the fingertips impart that last bit of spin. This is one of my little ideas that 2017LHP thinks is stupid and therefore doesn't concern himself with any skin care.
Lastly, has anyone read any good articles on the sequencing of moves in pitching? This sounds good, but I get the impression that to perfectly line up the sequence and continue to line up that sequence as some moves speed up requires timing that cannot necessarily be taught. Just think sequencing 1) trunk roation, 2) shoulder, 3) elbow, 4) wrist, and maybe 5) fingers. 1,2 and 3 are larger moves (of course #1 starts the sequence so no problem there), but as the arm accelerates, the window to perfectly time #4 and #5 gets extremely small. I guess I am curios to see if anyone has put any measurements on this timing.
