Everything you need to know about Antonio Brown’s eventual training camp: First, Brown, acquired by the Raiders for a first-round pick last winter, began missing practices for an undisclosed foot injury ... Last week, reports said Brown was ailing from "extreme frostbite" caused by a cryotherapy machine ... His feet don’t look great ... On Friday, Adam Schefter reported Brown won’t play football again unless he can wear the previous version of his helmet ... You must read this thread from Michael Silver ... Brown tried to repaint his old Steelers helmet and sneak it into practice .