2:11 PM PT -- That didn't last long.
Antonio Brown says he was in his feelings when he claimed he was quitting the NFL ... tweeting he's still hoping to make a return to football.
"I'm just very frustrated right now with the false allegations and slander to my name. I love football and I miss it."
"I just want to play and I'm very emotional about that. I'm determined to make my way back to the NFL asap"
9:19 AM PT -- AND NOW THIS ... ANTONIO BROWN SAYS HE'S QUITTING THE NFL FOREVER.