Four-time NBA All-Star guard Kemba Walker announced his retirement from the league on social media, saying: "This has all been a dream... When I look back, I still can't believe the things I achieved in my career."

Walker, a former UConn star, averaged 19.3 points in 750 career regular-season games with the Charlotte Bobcats/Hornets, Celtics, Knicks, and Mavericks.

Walker led UConn to a 2011 national title and was named the Most Outstanding Player of the Final Four that year.