Message:None of those pitches should be illegal, anymore than fork ball or knuckler. It should be an arms race. Your pitcher starts tossing rosin, then expect theirs to do it too. Home field advantage as groundskeeper removes rosin bag, when visiting team's on the field.
Worst spitball ever:
https://www.google.com/search?client=firefox-b-1-d&q=youtube+It+Happens+Every+Spring#fpstate=ive&vld=cid:61cb8389,vid:iZlyqQ0LEBs,st:0
Watched movie several times as a kid. Never got old.
Yours,
IronRed
13-Jun-2025