The one who brought sorrow to MU is Rashford's close friend, a product of Carrington.

Tyrell Warren is a former talent developed at Manchester United’s academy, a close friend of Marcus Rashford, and was once coached under manager José Mourinho.

Tyrell Warren caused heartbreak for his former club by helping Grimsby secure a heavy defeat over Manchester United in the English League Cup early on August 28th. At 26 years old, Warren scored Grimsby’s second goal, increasing pressure on coach Ruben Amorim’s squad amid the “Red Devils”’ severe decline.

Moreover, he confidently converted a penalty kick, aiding Grimsby’s advancement to the third round after Man United equalized 2-2 in the final minutes to push the match into a shootout.

It was truly a perfect moment for the defender, who once trained in Man Utd colors alongside Marcus Rashford and Scott McTominay in the youth teams. Warren left Old Trafford in 2019 after his contract was terminated, beginning his journey in lower leagues with Salford City before joining Grimsby.

Although he did not succeed at Man United, Warren clearly remembers his time working with top-class coaches, including Jose Mourinho. He was present at “The Special One”’s first training session at the club when he was just 17. He shared with Manchester Evening News, Warren said: “It was truly a crazy experience. I returned after summer break and (academy director) Nicky Butt told me I would train with the first team. I was very surprised, but I just went out to train and prove my ability.”

Warren admitted he learned a lot from Mourinho: “I learned how to maintain the intensity and pace of training, the strictness of the professional environment. I brought that back to the youth team and tried to apply it to every session.”

Although he couldn’t break into the first team, many of Warren’s peers succeeded, such as Rashford, McTominay, Axel Tuanzebe, Dean Henderson, and Cameron Borthwick-Jackson. Among them, Rashford (currently on loan at Barcelona) still maintains a close friendship with Warren. They even went on vacation together before the new season and trained privately as Rashford prepared to leave Man Utd.

Warren confided: “We are the same age, both from Manchester, grew up playing in local teams, so it was easy to bond. He came to watch some of my matches with friends, and it’s special to see Rashford still values our friendship and never forgets the past.”

Warren believes his close friend will “definitely” regain top form in Spain. For Amorim, he surely wished Rashford had been on the field during the failed comeback. Instead, the only Carrington-trained player who can hold his head high is Tyrell Warren—who delivered an outstanding performance both defensively and offensively.