Jon Duplantier is an MLB pitcher in the Arizona Diamondbacks organization. Originally from Delaware, Duplantier made his MLB debut at the start of the 2019 season. Off the diamond, Duplantier is a member of the Players Alliance, an organization of more than 100 black current and former professional baseball players, united to use their collective voice and platform to create increased opportunities for the black community in every aspect of sport and beyond.