Archie Gray was on the bench for Leeds in Saturday's 4-1 home defeat to Arsenal.
Marcelo Bielsa was forced to name 15-year-old Gray on Leeds' bench to face Arsenal with 10 of his senior stars out injured.
The Whites have been rocked by an injury crisis in the midst of their packed December schedule, with nine first-team regulars currently unavailable.
As a result of his depleted squad, the Leeds boss was left with no choice but to name Gray amongst the substitutes for their Premier League showdown with Arsenal.
The academy starlet, who is merely 15 years and 282 days old, was given the nod to make the bench at Elland Road on Saturday night.
Bielsa's substitutes against the Gunners had a combined age of 18, with all eight players under the age of 21.
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!