NBA Star Bradley Beal Under Police Investigation Over Postgame Incident W/ Fans

Washington Wizards shooting guard Bradley Beal -- a three-time NBA All-Star -- is under police investigation ... after he was involved in a confrontation with some hecklers following a game last week, TMZ Sports has learned.

The complaint against Beal was lodged on March 22, according to the Orlando Police Dept., roughly 24 hours after the basketball player was involved in a spat with two fans following his team's 122-112 loss to the Magic in Florida.

The dispute between Beal and the fans arose right after the 29-year-old hooper was walking down a tunnel to the Wizards' locker room area at Amway Center.

One of the guys in a group yelled at Beal, "You f***ed me [out of] $1,300, you f***!"

Beal then turned, walked toward the fans, and appeared to knock the hat off one of the guys' heads in response to the heckle.

Beal and the fans then jawed back and forth, with Beal calling the comment "disrespectful."

"Keep it a buck," Beal said. "I don't give a f*** about none of your bets or your parlays, bro. That ain't why I play the game."

Things were tense between Beal and the group -- with the men exchanging a flurry of words -- before the Wizards star was ushered into the locker room without further incident.

The jawing back and forth lasted about 50 seconds before Beal was ushered away.

But, the alleged victim contacted police and they met the following day. The fan told police Beal hit him in the head when he swatted the cap. Cops took a report for battery and began investigating.

Police watched cell phone video of the incident. They also went to the Amway Center in an attempt to hunt down surveillance video, but the incident occurred off camera.

The alleged victim told cops he wants to press charges against Beal, and police noted there was enough probable cause to charge Bradley with "simple battery," saying "charges will be filed at large with the State Attorney's Office."

As for the Wizards, they tell us ... “We are aware of the situation regarding Bradley Beal in Orlando but won’t have further comment until we’ve gathered more information.”

The Magic, meanwhile, tell us they are aware of the incident and are letting the OPD handle it.