Antonio Brown is changing his tune on Tom Brady ... unleashing on the 7-time Super Bowl champ for being MIA at training camp, claiming he's manipulating the game.
Brady is currently taking time away from the Bucs to "deal with personal things" ... an absence that has been approved by team honchos in advance.
AB was super complimentary of his former QB to TMZ Sports last week ... saying he misses Brady and the Buccaneers.
But something set Brown off in the couple days since .