(Fox news)__

One of the greatest basketball players in the history of the game is calling it quits.

Four-time NBA champion Shaquille O’Neal is retiring. He first announced his retirement on a Twitter video.

"We did it. Nineteen years, baby. I want to thank you very much. I’m about to retire," he said in the video.

Shaq won three NBA championships with the Los Angeles Lakers and one with the Miami Heat.

Last year, he had a limited role with the Boston Celtics.