he was 14–5 with a 2.86 ERA, earning him a late season promotion to the Triple-A Oklahoma City Dodgers, where he allowed one run in innings in his one start. The Dodgers added him to their 40-man roster after the season. Seattle Mariners On March 1, 2017, he was traded to the Seattle Mariners in exchange for minor leaguers Drew Jackson and Aneurys Zabala. The Mariners added him to the major league roster on April 3, 2017. He made his major league debut against the Houston Astros at Minute Maid Park in Houston on April 5, 2017, gaining the loss by giving up a three-run home run to George Springer in bottom of the 13th inning in the Astros' 5–3 victory over the Mariners. After the game, De Jong was optioned to the Tacoma Rainiers of the Pacific Coast League after the Mariners activated Dillon Overton from the paternity list. Minnesota Twins On July 30, 2018, De Jong was traded to the Minnesota Twins along with infielder Ryan Costello for pitcher Zach Duke. He was called up in September of that year. On January 30, 2019, De Jong was designated for assignment after the signing of Martin Perez was made official. He was outrighted on February 6. DeJong had his contract selected on April 6, 2019. After a game against the Mets where he gave up 4 earned runs, 1 home run, and 3 walks in 1 inning pitched, he was sent back down to Triple-A Rochester. DeJong was outrighted off the roster on April 26, 2019. Sugar Land Skeeters On July 22, 2019, De Jong signed with the Sugar Land Skeeters of the Atlantic League of Professional Baseball. He became a free agent following the season. On April 1, 2020, De Jong re-signed with the Skeeters for the 2020 season. Houston Astros On August 3, 2020, the Houston Astros acquired the rights to De Jong from the Sugar Land Skeeters. On August 23, 2020, De Jong was selected to the active roster. In 3 appearances for the Astros, De Jong struggled to a 14.73 ERA. On October 30, De Jong elected free agency. Pittsburgh Pirates On January 5, 2021, De Jong signed a minor league contract with the Pittsburgh Pirates organization. On May 30, De Jong was selected to the active roster. He made his season debut as the Pirates’ starting pitcher against the Colorado Rockies, going 5.0 innings