In exchange, the NL West leaders sent minor league pitcher Rob Rasmussen to the Phillies on Saturday night.
Young batted .276 with eight home runs and 42 RBIs in 126 games with the Phillies this season, including seven hits in his last 10 at-bats before the trade. He has made 101 starts at third base and 17 at first.
The 36-year-old veteran is a .300 career hitter with 185 homers and 1,026 RBIs.
Young was acquired by the Phillies last December from Texas. He is from nearby Covina.
As part of the deal, the Phillies sent cash to the Dodgers.