Yes, but Dane Scarlett & Alfie Devine both made their first team debuts for us as 16-year-olds.
Cynically, I've always wondered if this was Mourinho creating a narrative "look the Special One gave these players their debuts" in case they become superstars.
Anyway, the key developmental question is how do Spurs (& all clubs) then help these young players to develop & fulfil their potential during those crucial late teen / early 20s years?
Would Harry Kane have become such a great player if we'd stuck him in the first team at 17? Or did he benefit from numerous loans, and fighting to climb the striker pecking order to get ahead of Soldado and Adebayor when he was 20-21 years old?
I agree with those who argue that young players need to play competitive football. But to play for Spurs (or any top PL team), the Head Coach needs to believe the player can contribute & commit to them, as Guardiola did with Foden but wasn't prepared to do with Sancho (hence his move to Dortmund to play regularly).
- all those players you list were absolutely outstanding at 17. First time I saw Pedri, he was the best player on the pitch. At 17, at Barca, that is ridiculously good.
Kane is a fantastic player. He wouldn't have been the best player on the pitch at 17 in a PL game.
As
Spursidol
has stated, what we can't repeat is the KWP & Foyth experiments, where talented young players were essentially starved of competitive match football at crucial developmental times.