Hell, I’ve seen college D1 pitch that way. Especially back in the day before they started to keep the pitcher from stepping outside the pitching rubber.
I throw up in my mouth everytime this "pitch" is talked about. The screwball, not to be out done by his older brother the "rise screw" and little brother, "drop screw". Pretty soon ESPN's 2 time Olympic Gold Medalist commentator will invent the "backdoor screw" (if it hasn't been invented already). And those parents who actually believe their kid has 8 pitches at 10 yrs old? These are the same nutjobs that will make the post game dinner depend on a win or loss. A win gets you steak somewhere, a loss you get Spaghetti O's. I'd almost rather have Casey Anthony for a parent instead!
DD and I have a running joke. When her fastball gets up out of the zone and the batter swings anyway, I yell, "Nice Riseball Kid!!!" Usually earns me a little grin from the mound.