LOS ANGELES: Jason Richardson, who was one of the greatest dunk specialists in league history, announced his retirement on Wednesday (Thursday in Manila) after 14 seasons in the National Basketball Association. Richardson spent his most productive years with the Golden State Warriors, where he blossomed into a 20-point scorer. Richardson played a half dozen seasons with Golden State, then joined the Phoenix Suns after two years in Charlotte. Richardson also made stops in Orlando and Philadelphia, where he finished his career after coming back from knee surgery. He was known for winning the annual dunk contest at the NBA all-star games.