Young and Powell are expected to be in uniform when Maine visits Fort Wayne on Sunday evening.
Powell, the 45th pick in June's draft, trekked to Maine for an intrasquad scrimmage last weekend. Young, the 17th pick, is on his first assignment.
Maine is idle until Friday's home-opener against Canton after Sunday's game, which means it's likely that Young and Powell would rejoin the Celtics after getting some much-needed game reps.
Chris Babb scored 22 points on Friday night as Maine won its season-opener while rallying from a 17-point deficit to top Oklahoma City 111-105.
The Red Claws set two team records for 3-pointers in the game while making 18 and attempting 48 overall.