The latest two to taste first team training are midfielder Alex Fernandez and goalkeeper Jesus.
Alex, 18, is a Spain U19 international and been likened to Arsenal captain Cesc Fabregas. He has been with Real for six years.
Goalkeeper Jesus is 22 and was snapped up last summer from Numancia on a free transfer.
Mourinho can now be regularly spotted at junior and Castilla games keeping a close watch on the talent coming through the system - similar to Sir Alex Ferguson's approach of managing Manchester United.