Jon Duplantier is a pitcher for the Arizona Diamondbacks. Signed by D-backs as a third-round selection in the First-Year Player Draft (June 14, 2016) [signed by Rusty Pendergrass]. Duplantier was the first pitcher to earn a 3.0+ inning save in his MLB debut since Dale Thayer/TB on May 22, 2009 @ Marlins and first NL pitcher since Brad Thompson/STL on May 8, 2005 vs Padres. In 2019, Duplantier was rated as the Diamondbacks No. 2 prospect (80th overall) by MLB.com and No. 2 (86th overall) by Baseball America. Duplantier also was a member of the 2017 SiriusXM All-Star Futures Game @ Marlins Park (1 ER in 0.2 IP).