Millwall manager Neil Harris has admitted that he will not be allowing any of more of the club's development squad leave on loan, before the transfer window slams shuts for deals at the end of the month.
The Lions sanctioned the temporary exit of Under-23's player Danny McNamara earlier this summer with the defender joining Newport County.
The 20-year-old has since made a bright start to his spell with the Exiles having featured in both of their League Two fixtures this season.
However, despite McNamara's success at Newport, Harris denied that he will be willing to allow any further departures from The Den.
Speaking to London News Online, the Millwall boss said: "The young lads aren't going out this window.
"It's a fine balance whether they are ready.
"Danny [McNamara] has gone to Newport and played the first two league games which I'm really pleased about.
"It is a huge learning curve and bonus for him at such a tender age.
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"We'll continue to watch him very closely.
"James Brown is one we had high hopes for over the course of pre-season but he is out [injured] for three or four months.
"The other lads are very young in our U23 side.
"They need time to develop with Kevin Nugent and Paul Robinson."
Millwall's under-23's kick off their 2019/20 campaign against Leeds United on Monday in the second division of the Professional Development League.
The clash with the Whites will be a stern test for the Lions given that Carlos Corberan's side won the overall title earlier this year as well as the regional competition.
The Verdict
With the Lions finishing sixth in their section of the Professional Development League last season, the aim for the current campaign will be to push on towards challenging for a top-four finish.
However, in order to achieve this, it is important that Harris keeps the under-23 squad intact and thus it is not at all surprising that he is unwilling to allow any further departures this summer.
Whereas it could be argued that youth football is no substitute for the experience that a player can gain by playing regularly at senior level, Millwall should not throw their youngsters into the deep end if they are not ready to make the step up.
Furthermore, if the Lions' next generation of talent are to make the transition to the first team in the not too distant future, they will firstly need to build a rapport with each-other which can only been gained by playing week-in, week-out in the same team.