Here's how bad Antonio Brown's meltdown was on Sunday .... even O.J. Simpson is ripping the NFL star for his shirtless in-game antics.
Just minutes after AB threw off his jersey and pads and proceeded to quit on the Buccaneers in the middle of their game against the Jets ... O.J. took to Twitter to blast the wide receiver.
Simpson called Brown's actions "inexcusable," and then torched the 33-year-old for letting down Tom Brady.
"Playoffs are coming up," Simpson said. "And you pull this crap on a guy who really went out on a limb for you?