Twenty two call-ups have so far reported to the Flying Eagles training camp in Kaduna, officials have disclosed.
The players include FC Porto striker Jacob Njoku, Musa Newman from Sunshine Stars, Prince Izu Omego, Wilfred Ndidi, Abdullahi Alfa, Ifeanyi Nweke, Tony Edjomariegwe and Mustapha Abdullahi.
Others are Sulaiman Abdullahi, Ifeanyi Matthew, Chisom Eze and Zaharadeen Bello.
This training camp is for players who are based locally as another screening exercise will be conducted for overseas pros early in the New Year, according to coach Manu Garba.
The Nigeria U20s are preparing for the 2015 African Youth Championship slated for Senegal from March 8.
The top four semi-finalists at the AYC will represent Africa at the 2015 FIFA U20 World Cup in New Zealand.