USA debut seals the hype around Cavan Sullivan, the 17-year-old City have already signed

Cavan Sullivan turned 17 on Saturday and celebrated with a senior international debut, playing an hour of the United States’ friendly win over Peru — a milestone that reinforces exactly why Manchester City agreed to sign him back in 2024, with the teenager set to join the club on his 18th birthday next year.

Sullivan has been in extraordinary form for Philadelphia Union this MLS season, recording 13 goal contributions since the summer World Cup break — a tally matched among all players only by Lionel Messi. That run of form made him impossible for US head coach Mauricio Pochettino to overlook, and the teenager delivered a composed performance on his debut in what was a comfortable American victory.

“If we only talk about his performance, he’s doing really well in his club in Philadelphia,” Pochettino said ahead of the match. “He’s mature enough on the field.”

Sullivan was candid about the emotion of the occasion. “It was a really special day for me, my family,” he said. “It’s crazy that I represented my country at the highest level with the men’s national team, so I’m really happy to have done this. Overall, it was a really amazing night.”

He added: “There were nerves — I was super excited, a little bit of both. Pregame was definitely nerve-wracking.”

Philadelphia Union interim head coach Ryan Richter has pointed to something beyond Sullivan’s obvious creative gifts as the quality that sets him apart. “A lot of attention goes on the creative things that he brings to the game,” Richter told ESPN. “But the thing that stands out to me the most is his mentality.”

City beat off competition from several of the world’s leading clubs to secure Sullivan’s signature, and those inside the game who have worked closely with the teenager — who still lives at the family home — consistently describe a player whose mental maturity matches his technical ability.

Exactly how Sullivan fits into City’s plans when he arrives remains open. Whether he slots into the first-team squad, develops through the academy, or heads out on loan is yet to be determined. What Saturday’s debut confirmed is that the player City are getting in 2027 is already operating at senior international level, with further caps expected as the US squad continues its preparations for the 2026 World Cup on home soil.