National Basketball Association superstar Shaquille O'Neal has announced his retirement after 19 seasons in the league.

He posted a video with the announcement on his Twitter account Wednesday.

The No.1 draft pick in 1992 is known around the world as “Shaq.” While playing for five NBA teams he won four championship rings, one Most Valuable Player award, three Finals MVP trophies and made 15 All-Star appearances.

The 39-year-old was also a two-time scoring champion and is fifth all-time on the NBA's list for career points with 28,596 and 12th in total rebounds with 13,099.

The 2.16-meter tall center began his playing career with the Orlando Magic but enjoyed the most success while playing for the Los Angeles Lakers, winning three titles with fellow superstar Kobe Bryant. O'Neal also won a championship with the Miami Heat in 2006. He played this season with the Boston Celtics but was limited with injuries throughout the year.

O'Neal is known just as much for his off-court antics as he is for his on-court performance. He has released several hip-hop albums, starred in movies and television shows and worked in law enforcement.