"I lacked judgment and was naive about the Internet. I realize this is not an excuse, but it is something I truly regret. I realize this affects my entire family and I am embarrassed by it," Wright said in a statement released Monday by Heat management.
Wright said the photo was taken a year ago in what he thought was a private Internet chat session, the South Florida Sun-Sentinel reported Tuesday.
A Wright fan initially posted the photo on the Web after Wright's girlfriend, who also is the mother of his child, had posted comments about Wright being a virtuous man, the Internet site Mediatakeout.com reported.
Earlier this month, Wright publicly apologized for his arrest March 11 for allegedly driving under the influence of alcohol and driving with a suspended license.