The Astros wouldn't confirm the deal, citing team policy of not announcing any deals until a contract has been finalized.
DeShields Jr., the son of former Major Leaguer Delino DeShields, was drafted with the No. 8 overall pick in June's First-Year Player Draft. His father told MLB.com on Monday he planned to sign with the Astros and not attend LSU, where he was offered a baseball scholarship.
DeShields Jr. was drafted as a second baseman out of Woodward Academy in College Park, Ga., where he played the outfield. DeShields Jr., who committed to LSU to play baseball, was the leadoff hitter for his private school and hit .415 and led the team in homers (9), RBIs (40) and stolen bases (29).