Antonio Brown got into a heated spat with a security guard at a National Arena League game over the weekend ... but a spokesperson for the venue tells TMZ Sports the former NFL star was in the wrong in the situation.
The incident went down at halftime of Albany Empire's season-opening game against the Orlando Predators in New York ... when Brown -- who just became part owner of the Albany squad last month -- was down on the field trying to hype up fans.
In videos that Brown posted from the game, you can see as he was shaking hands with kids and waving to people in the stands .