Morandini will also be the team's baserunning instructor.
Morandini's hire means Phillies manager Pete Mackanin's coaching staff is complete. The group includes bench coach Larry Bowa, hitting coach Steve Henderson, pitching coach Bob McClure, third-base coach Juan Samuel, bullpen coach Rick Kranitz and catching coach John McLaren.
Assistant coach Jorge Velandia will return to his role as special assistant to player personnel. He joined the coaching staff in June following Ryne Sandberg's departure and Mackanin's promotion.
Todd Zolecki is a reporter for MLB.com. Read his Phillies blog The Zo Zone, follow him on Twitter and listen to his podcast.