I have a serious question here. What causes the late break on a pitch that analysts are always talking about? A pitch leaves the pitcher's hand with a certain spin rate and velocity which determine the size and direction of the break. If a pitch is to start breaking more during its flight, it can't be because the spin rate increases; if anything, the spin rate will decrease slightly during its flight. That would actually cause it to break less. Contrariwise, the velocity of a thrown ball will decrease slightly during its flight because of air resistance. That slower speed would cause it to break slightly more because of less inertia. So the two effects would seem to even out.
What then, is the cause of the late break, or is the late break effect an illusion of some sort?