Antonio Brown appears to be showing some regret over his infamous, shirtless breakup with the Tampa Bay Buccaneers ... admitting his wild outburst was unprofessional and unnecessary.
AB touched down in Los Angeles Monday afternoon after a week of living it up in NYC ... and just hours after his flight to the west coast, he hit up hotspot Craig's for a bite to eat with his new buddy, Kanye West.
But, before he went inside, the Super Bowl champ had a quick convo with the camera guys about his bizarre departure from last Sunday's game ... and he seems to wish he had handled himself differently.
"It probably wasn't necessary or professional," AB said ... all while keeping a smile on his face.
It's an interesting admission -- AB had previously been giving the middle finger to the Bucs since the breakup ... claiming they were trying to force him to play with an ankle injury prior to his exit.
Despite all the drama, AB has shifted his focus to music ... and has been linking up with some huge names like Fabolous after his season ended.