Giuseppe Rossi will be let off the leash by Newcastle in the Carling Cup on Wednesday.
The precocious Italian joined Newcastle on loan from Manchester United in August, but he has so far been restricted to a substitute's role.
This is reported to have upset Manchester United chief Sir Alex Ferguson who had been keen for Rossi to accrue some valuable top-flight experience.
The Carling Cup has handed Roeder the chance to hand Rossi his debut and the Italian will be charged with helping The Magpies arrest their slide.
"Giuseppe Rossi is going to make his debut," Roeder told Sky Sports News ahead of the meeting with Portsmouth.
"I am happy to say that and I am looking forward to seeing him playing.
"He has been patient and hopefully he will do very well."
Kieron Dyer came through a practice game with Darlington on Tuesday and is looking to make a return to action at the weekend.
The midfielder finally seems to be over his injury troubles and is looking to figure against Charlton.
"I feel great, I'm really happy with my fitness and my general condition now," Dyer told the club's website.
"I haven't rushed it, the manager has held me back, but I'd like to think I've done enough to be in the squad for the Charlton game at the weekend."