Follow on Twitter Former NBA guard Leandro Barbosa has retired from playing professional basketball and will join Steve Kerr's staff with the Golden State Warriors as a player-mentor coach. Barbosa, who played 14 years in the league, and most recently was playing professionally in Brazil before the COVID-19 pandemic cut his team's season short, won a championship with the Warriors in 2015-16 and is excited to be reunited with Kerr and several of his former teammates.