11:43 AM PT -- The Steelers issued a statement saying they were just made aware of the incident involving Brown today, and are currently gathering information.

11:08 AM PT -- Brown's attorney, Darren Heitner, issued a statement calling the allegations "baseless and false."

He added, "It's unfortunate that the media is trying to use distractions like this and prior stories in an effort to tarnish my client's name and reputation. We have no further comment."

Pittsburgh Steelers superstar Antonio Brown was involved in a domestic dispute in January -- but he was NOT arrested ... TMZ Sports has confirmed with police.

Our sources tell us a woman contacted the Hollywood Police Dept. in Florida in mid-January and made a report alleging misconduct by Brown.

The details surrounding her allegations are unclear -- but we know cops investigated.

A rep for the Hollywood Police Dept. tells TMZ Sports, "Mr. Brown was involved in a domestic dispute. No arrests were made."

We've reached out to Brown's camp for comment multiple times -- so far, no word back.

It's just the latest in a string of off-the-field drama for Brown -- who's not only been feuding with the Steelers, but he's also being sued over an alleged furniture-tossing tirade back in April.

TMZ Sports broke the story ... the man behind the lawsuit claims Brown almost killed his 22-month-old son by throwing furniture off the balcony of his Florida apartment.

Brown claims the man is lying and has said in a statement, "I'm innocent."

Antonio has been in Florida training for the NFL season -- he's from Miami.