Sandberg had spent the past two seasons managing Philadelphia's Triple-A affiliate, the Lehigh Valley IronPigs. The Phillies also promoted Steve Henderson to hitting coach and Rod Nichols to bullpen coach.
The moves were announced Thursday, a day after the Phillies fired first-base coach Sam Perlozzo, hitting coach Greg Gross and bench coach Pete Mackanin.
Pitching coach Rich Dubee will return. Mick Billmeyer goes from bullpen coach to catching coach. Juan Samuel, the former third-base coach, was offered the role of first-base coach and outfield and baserunning instructor.
The Phillies finished 81-81 this season after winning five straight NL East title and the 2008 World Series title.