Chelsea manager Jose Mournho says quartet Nathaniel Chalobah, Josh McEachran, Lucas Piazon and Wallace will be loaned out next season.
Chalobah and McEachran, both of whom played for the England Under 21's during the European Championships, spent spells at Watford and Middlesbrough respectively last season.
Piazon, who made the first of his three Chelsea appearances last term, joined Malaga for the second half of the 2012/13 campaign while Wallace, who joined the Blues from Fluminese last December but returned to Brazil for the rest of the season, is ineligible having not yet gained a work permit.
Meanwhile, Islam Feruz, who is still to make a professional appearance for Chelsea but impressed in the club's run to the Nextgen Series final, will remain with the club's Under 21 side.
"We are thinking of letting Nathaniel go on loan for a last season," Mourinho said. "That is our intention and he knows.
"We have discussed that with him. He is a very, very good player. I like him very much and am very impressed. For sure, he is a Chelsea player.
"We will see whether or not it is a Premier League club but he would have to play every weekend for the last year of his loan period.
"He could be in our squad already but we think one more season will help and then he will come back for 2014-15. It will be his last one out on loan. He is very, very good.
"Josh will also go on loan, Lucas Piazón too," the Portuguese manager added. "Wallace will go on loan - he has no work permit and will go on loan in Europe, not in South America, to make the transfer easier for him.
"Islam Feruz will stay in our under-21s."
Mourinho is hoping to have better luck attaining a work permit for Burkina Faso international trialist Bertrand Traore, who has impressed while on Chelsea's Far East pre-season tour.
Despite possessing a reputation for marginalising young players, Mourinho has already declared that Belgian duo Kevin de Bruyne and Romelu Lukaku - sent out on loan during previous regimes - will play a part in the Chelsea first team squad this season - pointing towards a change of emphasis during his second spell at Stamford Bridge.