Paul Hayes played 90 minutes for Crawley Town as they were beaten on Easter Monday.
The striker joined the Sussex side on loan earlier this month and made his fifth start in the Bank Holiday fixture.
Crawley were beaten 3-0 by Shrewsbury Town in Shropshire.
They conceded three second half goals – Shrewsbury striker Tom Eaves scoring a hat-trick – to fall to a first defeat since Brentford won in Sussex at the end of February.
The only one of Brentford’s young players to get any game time out on loan was Stefan Tomasevic.
The Youth Team central defender in with Hayes and Yeading United, of the Blue Square Bet South, on a work experience basis.
He joined Hayes earlier this week having previously been with Northwood.
Stefan played 90 minutes for Hayes and Yeading’s Reserve Team against Hampton and Richmond Borough’s second string on Tuesday.
He helped his new side to a clean sheet and a 1-0 win.
Brentford scholars Josh Clarke and Tyrell Miller-Rodney are currently with Carshalton Athletic, of the Ryman Premier League, on work experience.
Carshalton beat Hampton and Richmond Borough 3-0 on Easter Monday but neither Josh nor Tyrell were involved.
Development Squad defender Alfie Mawson is with Maidenhead United, of the Blue Square Bet South.
Maidenhead were beaten 2-1 by Farnborough on Easter Monday but Alfie missed the game with an injury.