Kobbie Mainoo's Rise at Manchester United Under Michael Carrick
Nine months ago, Kobbie Mainoo was preparing to pack his bags. Now, people inside Manchester United talk about him as the present and the future of the club – and they know exactly who to thank.
Michael Carrick.
From the fringes to the exit door
Mainoo’s breakthrough came early, catching the eye as a teenager under Erik ten Hag. He looked like the next academy jewel ready to be polished into a first‑team regular.
Then Ruben Amorim arrived.
Under the Portuguese coach, the 21-year-old simply disappeared from the Premier League picture. Across 21 league games with Amorim in charge, Mainoo did not start once. Not one. For a player of his age and ambition, that kind of freeze-out usually ends only one way.
By January, a move was on the table. Napoli wanted him. The deal would have reunited him with Rasmus Hojlund and Scott McTominay and offered a fresh start in Serie A. Inside the club, it was widely accepted that Mainoo stood on the brink of leaving.
United were close to losing one of Carrington’s brightest products before he had really begun.
Carrick walks in, the door slams shut
Then the landscape changed. Amorim was sacked, Carrick stepped in, and Mainoo’s story flipped.
Carrick, 45, immediately reshaped the midfield. Bruno Fernandes was pushed back into his natural territory as a pure attacking midfielder. That decision opened up a slot in the double pivot. Mainoo was dropped in alongside Casemiro.
It clicked.
With trust from the touchline and a defined role on the pitch, Mainoo’s game grew rapidly in the second half of the season. His performances carried enough weight to earn him a place in Thomas Tuchel’s World Cup squad. He did not play a minute at the tournament, but the call-up alone underlined how far he had come in such a short spell.
Inside Old Trafford, the verdict is clear. As reported by Fabrizio Romano on his YouTube channel, United officials are “delighted” with Mainoo and see him as central to their plans going forward. Carrick’s intervention is described as “super appreciated” – because without his arrival, Mainoo would almost certainly have been on a plane to Italy.
A manager who backs the academy
Carrick’s approach contrasts sharply with Amorim’s. Where Amorim showed little inclination to lean on the club’s academy products, Carrick has embraced them.
He is known to attend youth games at Carrington whenever his schedule allows, keeping a close eye on the next wave. Mainoo stands as the prime example of what that philosophy can yield. Right now, he can be fairly described as United’s standout homegrown product of recent years.
The club now views the aborted sale to Napoli as a major escape. They were a decision or two away from cashing in on a midfielder who is suddenly central to their rebuild.
Building the next United midfield
Backed by Carrick’s trust and a fanbase that has quickly taken to him, Mainoo is improving almost week by week. He is already seen as crucial to the manager’s plans.
At present, he is operating alongside Youri Tielemans, learning, adapting, and adding layers to his game. The long-term vision, though, points towards a partnership with Carlos Baleba. Inside the club, there is a belief that Baleba’s profile dovetails with Mainoo’s, offering balance and bite in equal measure.
If that pairing gels quickly, United may have the core of their midfield locked down for years.
From nearly being shipped out to Napoli to becoming a cornerstone of Carrick’s project, Mainoo’s trajectory says as much about the player’s resilience as it does about the manager’s faith. Now the question is no longer whether he belongs at Old Trafford, but just how high he can climb under Carrick’s watch.
