They will join the Flyers on Thursday for the game at Tampa Bay.
If Nedved, a center, and left winger Dimitrakos clear waivers by Thursday, they will be assigned to the Phantoms. Free-agent defenseman Baumgartner will remain with the Flyers.
Baumgartner had one assist, and Dimitrakos and Nedved were both scoreless this season.
The 34-year-old Nedved, acquired by the Flyers in January in a trade with the Phoenix Coyotes, has 308 goals and 705 points in 942 career games over a 15-year career.