NBA player DeJuan Blair -- who played for the Washington Wizards last season -- was cited for misdemeanor battery against a woman at a Vegas club this weekend ... TMZ Sports has learned.
Las Vegas Metro PD has confirmed ... officers were called to Drai's nightclub at The Cromwell around 1 AM Sunday morning to respond to a report of a man who allegedly got physical with a woman.
The alleged victim told police ... she was arguing with Blair over the line into the club when he picked her up and tossed her off to the side. The woman was pissed and retaliated by striking him back -- before calling for help.
Sources tell us ... when cops arrived they checked security video and decided there was enough evidence to issue a citation to Blair for misdemeanor battery. He was NOT arrested.
However, cops tell TMZ Sports Blair was also issued a "trespassing warning" from the property and told to leave immediately.
People close to Blair tell TMZ Sports he's adamant he did not throw the woman -- as one source put it, "He simply moved her out of the way when he was trying to get by her. Nothing more."
As for the woman, we're told she refused medical treatment -- but she's still pissed and is considering a lawsuit against the NBA player.