The Dodgers sent relief pitcher Josh Lindblom, minor league pitcher Ethan Martin and a player to be named later to Philadelphia for Victorino.
"We're excited to add an All-Star-caliber player with postseason experience," said Dodgers general manager Ned Colletti. "He plays the game with passion, gives us a top of the order bat from both sides of the plate, can steal bases and is solid defensively in the outfield."
Victorino, 31, was selected as an All-Star in 2009 and 2011 and had won three Gold Gloves. But his .261 batting average is below his career average (.277). He's hit nine home run this season and has 40 runs batted in.
He broke into the majors with San Diego, playing 36 games for the Padres in 2003, but the rest of his 1,023 career games have been played for the Phillies.
Lindblom, 25, is in his second major league season with the Dodgers and has a 3.02 earned run average in 48 appearances. He's struck out 43 and walked 18 in 47 2/3 innings pitched in 2012.
Martin, Los Angeles' first-round pick in 2008, is 8-6 with a 3.58 ERA in 20 starts for Double-A Chattanooga this year.