There is a video from a US U-15 training camp three years ago that captures everything you need to know about Cavan Sullivan. A cross floats into the box, too high for his 13-year-old frame to reach with a header. Instead of jumping, he throws himself into a scorpion kick, flicking the ball behind him and into the path of a teammate for an outrageous assist. It was an early glimpse of a footballer whose next move is nearly impossible to predict — and yet, remarkably, the predictions surrounding him keep coming true.
Sullivan has been on scouts' radars since childhood. He signed a deal with Manchester City before ever playing a professional minute, agreeing to join the Premier League club on his 18th birthday. At 14, he became the youngest debutant in Major League Soccer history, surpassing a record previously held by Freddy Adu — a name that still serves as a cautionary tale about the burden of early hype in American soccer.
For two years after turning pro, Sullivan largely watched from the bench at the Philadelphia Union, more promise than product. This season, however, he has finally been given consistent minutes, and the early data suggests the wait was worth it.
Of the ten teenagers who have logged the most MLS minutes since 2015, eight have gone on to play in one of Europe's top five leagues. Sullivan has accumulated more minutes than any other 16-year-old in that span, trailing only 17-year-old Adri Mehmeti of the New York Red Bulls among slightly older players.
His teammates' trust in him has been evident from the start. Jim Curtin, Sullivan's first coach at the Union, recalled how quickly the squad embraced him. "No matter what age you are, when a practice starts and guys give you the ball, that's the ultimate sign of respect," Curtin said. "Within 10 seconds into the first training session, they gave him the ball."
The numbers back up that faith. Sullivan takes 10.3% of his team's touches, the highest rate among MLS teenage wingers in at least a decade — second only to Bayern Munich's Alphonso Davies at a similar age. His production this season includes four goals and three assists in MLS play, rising to seven and seven across all competitions, with three goals and three assists in his last five matches alone.
Advanced metrics paint an equally flattering picture. Using the possession value model from the futi stats app, Sullivan's 2026 season ranks as the second-best campaign by any MLS teenager on record, behind only Gianluca Busio's effort at 19 — Busio now captains Venezia in Serie A.
Comparisons to Lionel Messi are almost unavoidable given Sullivan's stature, left foot, and love of flair, and it is publicly known that Sullivan modeled his game on the Argentine great. His first professional goal, a cutback finish after combining with an overlapping left-back, echoed Messi's classic partnership with Jordi Alba. Statistically, though, his profile more closely resembles Alexis Sánchez — a low center of gravity, quick feet, and a willingness to try the unexpected.
"I would say the big word is 'playmaker,'" Sullivan told ESPN at age 14. "That's what I try and be every game, every training. I think I'm good on the dribble. My decision making is pretty good, and my vision on the field is one of my qualities."
That vision shows in his passing numbers — 5.0 progressive passes per 90 minutes, among the top five for MLS wide attackers — even as his 65% pass completion rate ranks among the league's lowest, a byproduct of Philadelphia's direct style and his own risk-taking.
Questions remain about how his size, listed at 5ft 7in, and modest top speed will translate to the physicality of the Premier League. Still, Sullivan has spent his career outmaneuvering bigger, faster opponents. Whatever comes next for the young winger, it is unlikely to be predictable.
Based on reporting from The Guardian.