Gray’s debut could hardly have been timed much better as Leeds romped to a 6-0 win over Stoke City and promotion back to the Premier League.
The 16-year-old was front and centre of celebrations as his boyhood club finally escaped the Championship at the second time of asking.
Gray’s debut makes him the youngest member of his illustrious family to pull on the white shirt of Leeds, beating elder brother Archie’s record which was set at the beginning of last season.
Here, the YEP recaps the 15 youngest players to represent Leeds and where they are now.
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13. Harry Gray: 16 years, 6 months and 13 days
Teen forward Gray made his Elland Road bow on April 21 as Leeds were promoted back to the Premier League. He becomes the fourth-youngest player in the club's history and the youngest of five Gray family members to pull on the white shirt. | Getty Images
14. Aaron Lennon: 16 years, 4 months and 7 days
Electric winger Lennon is Leeds' second-youngest ever player, making his bow in the Premier League against Tottenham Hotspur back in 2003. His career has taken him to major international tournaments with England and Wembley Stadium as a League Cup winner with Spurs in 2008. | Getty Images
15. Tom Elliott: 16 years, 2 months and 25 days
Shortly after turning 16 back in 2007, imposing forward Elliott made his Leeds debut. His debut under Dennis Wise would be one of only four outings for the club, before enjoying a relatively successful career in the EFL with the likes of Cambridge United, AFC Wimbledon and Salford City. | Getty Images
16. Peter Lorimer: 15 years, 9 months and 19 days
Last but by no means least, 'Lash' is the youngest player ever to turn out for the Whites, making his debut as a 15-year-old in 1962. He is one of few men with club legend status at Elland Road. | Getty Images