David West, a power forward who played 15 seasons in the NBA and won titles with Golden State the past two seasons, announced his retirement Thursday on social media. "I have been fortunate enough to live out my childhood dream of playing in the NBA," West wrote in a statement. West, an American who turned 38 on Wednesday, was the 18th overall selection in the 2003 NBA Draft by the New Orleans Hornets and played for the team until 2011, when he joined the Indiana Pacers.