Caught a lot of fast pitch softball in my younger years....Most surely I caught guy's that threw rise balls.
No doubt in my mind.....
I suppose they will tell us....ping pong balls don't curve, and frisbee's don't either.
While in the army from '69 - '72, I played fast pitch against several semi-pro softball pitchers from the south who had been drafted.
They had absolutely everything in their pitching arsenal, and from approx. 45 feet a fastball at about 90 mph. was an unseen missle.........
While I was a great fielder, I was a lously batter. The only noteworthy hit I can remember was a triple down the first base line. And that was only because I was so late swinging at the fastball that I accidentally made contact with it.........LOL!