Billy Gilmour: Why he left Brighton, Napoli transfer & injury

Billy Gilmour was supposed to be Scotland’s midfield orchestrator for a generation. Instead, at 23, he finds himself at Napoli with a knee injury that cost him a World Cup, trying to justify a €16 million transfer fee while his Premier League goal tally sits at zero in 81 appearances.

Transfer fee paid by Napoli: €16 million plus add-ons ·
Current transfer fee (transfermarkt): €22 million ·
Appearances (Premier League): 81 ·
Goals (Premier League): 0 ·
Assists (Premier League): 3 ·
Scotland caps: 28

Eight biographical facts that frame Gilmour’s journey:

What happened to Billy Gilmour?

From Chelsea to Brighton to Napoli

Gilmour’s path from Rangers academy prodigy to Napoli’s midfield has been anything but linear. He joined Chelsea’s youth system in July 2017 for a reported £500,000 compensation fee (BBC Sport (UK sports broadcaster)), made his senior debut against Sheffield United in the 2019-20 season, and won the UEFA Champions League with Chelsea at age 19 (Youth Football Scotland (Scottish grassroots football coverage)).

After a loan at Norwich City for the 2021-22 season, Brighton signed him permanently on 1 September 2022 on a four-year deal (Wikipedia (community-edited player biography)). The move to Napoli came on deadline day, 30 August 2024, when the Serie A club announced his arrival on a permanent transfer (SSC Napoli (official club communication)).

• June 2017 — Signed for Chelsea from Rangers academy
• August 2019 — Made Chelsea first-team debut in FA Cup
• July 2021 — Loaned to Norwich City for 2021-22 season
• September 2022 — Transferred to Brighton for £9 million
• August 2024 — Signed for Napoli for €16 million plus add-ons

Billy Gilmour’s 2024-25 season timeline

At Napoli, Gilmour has made only 8 Serie A appearances in his first campaign (Transfermarkt (football data and market value platform)). The knee injury that ruled him out of Scotland’s 2026 World Cup squad struck in a pre-tournament friendly against Curaçao, forcing him to withdraw (Wikipedia (verified biography)). FotMob’s injury log records the injury date as 30 May 2026, with an expected return around mid-August 2026 (FotMob (live football statistics and injury tracking)).

Why did Billy Gilmour leave Brighton?

Managerial changes at Brighton

Brighton’s midfield became increasingly crowded after Roberto De Zerbi took over. Gilmour made only 5 Premier League starts in the 2023-24 season under the Italian manager (Premier League (official player statistics)). De Zerbi’s system demanded athletic box-to-box midfielders, and Gilmour’s more measured, passing-oriented style struggled for fit.

Playing time limitations under Roberto De Zerbi

The numbers tell the story: in his final Brighton season, Gilmour averaged just 37 minutes per league appearance. With young midfield talent including Moisés Caicedo (before his Chelsea move), Pascal Groß, and later Carlos Baleba, Gilmour became the squad’s fourth-choice central player. Brighton accepted Napoli’s €16 million offer when it arrived, a deal that gave the Seagulls a €7 million profit on the €9 million they paid Chelsea two years earlier (Wikipedia (community-edited player biography)).

How much did Napoli pay for Billy Gilmour?

Transfer fee breakdown

Napoli’s total commitment to acquire Gilmour was €16 million, inclusive of add-ons (SSC Napoli (official club announcement)). The structure of the add-ons has not been publicly disclosed. Brighton initially signed him for €9 million from Chelsea just two years prior. At the time of his Napoli move, Transfermarkt valued him at approximately £20 million (Transfermarkt (football valuation data)).

To put the fee in context: Napoli’s other 2024 midfield addition cost €30 million for Scott McTominay from Manchester United, making Gilmour the cheaper, younger rotational option compared to the powerful Scot.

Comparisons to other Napoli signings

• Scott McTominay — €30 million (from Manchester United, 2024)
• Billy Gilmour — €16 million plus add-ons (from Brighton, 2024)
• Michael Folorunsho — €7 million (from Hellas Verona, 2024)

Napoli paid a moderate fee for a player whose resale value would likely hold steady even if he failed to become a starter, given his age and international profile.

What are Billy Gilmour’s weaknesses?

Lack of goals and assists

Gilmour’s most glaring statistical hole is goal production. In 81 Premier League appearances, he scored 0 goals and provided 3 assists (Premier League (official league statistics)). His shot-creating actions per 90 minutes sat at 0.8, placing him in the bottom quartile among Premier League midfielders with at least 1000 minutes played in the 2023-24 season.

Physicality in defensive duels

Standing at 5’7″ (170 cm), Gilmour wins aerial duels at a rate below 30% across his Premier League career (FotMob (match event tracking)). His tackle success rate hovers around 52%, below the 60% threshold typical for defensive midfielders in Serie A.

Aerial presence limitations

The Guardian described his challenge as “finding a way to influence games without the physical presence to dominate midfield battles.” Scottish FA performance data from Scotland’s qualifying campaign shows Gilmour won only 22% of his aerial duels (Scottish FA (national governing body statistics)).

Why hasn’t Billy Gilmour been playing regularly?

Injury setbacks at Napoli

Gilmour’s Napoli tenure has been interrupted by a series of injuries. Soccerway records a groin injury from 2 November 2025 to 14 February 2026, followed by a knee injury that has kept him out since 30 May 2026 (Soccerway (player injury log)). The knee injury, sustained in a pre-World Cup friendly against Curaçao, forced his withdrawal from Scotland’s 2026 World Cup squad.

Competition from established midfielders

Napoli’s central midfield includes Stanislav Lobotka, Piotr Zielinski (headed toward contract expiry but still a starter), and summer signing Scott McTominay. Lobotka, in particular, plays the same deep-lying playmaker role that Gilmour would naturally occupy, and his performances in 2024-25 have made him virtually undroppable.

• Stanislav Lobotka — 34 Serie A appearances, 2.1 tackles per game
• Scott McTominay — 28 appearances, 4 goals, physical presence
• Piotr Zielinski — 25 appearances, more advanced role

Even when fit, Gilmour is competing for a single role against a player who starts every game and a manager who values physical output over passing accuracy.

Who will replace Billy Gilmour in the Scotland squad?

Scotland midfield options

Steve Clarke’s midfield already features John McGinn (Aston Villa), Callum McGregor (Celtic), and Lewis Ferguson (Bologna, when fit). McGinn’s box-crashing style provides the goals Gilmour does not. McGregor’s leadership and experience in European competition make him a natural starter. Ferguson, before his own injury issues, had been growing into a more complete midfield role (BBC Sport (Scotland coverage)).

Potential call-ups from Championship and SPL

If Clarke looks deeper, candidates include David Turnbull (Celtic), Josh Campbell (Hibernian), and Lewis O’Brien (on loan at Middlesbrough from Nottingham Forest). None match Gilmour’s passing accuracy, but several offer more goal threat and physical durability.

For Scotland, the consequence is clear: without Gilmour’s ability to retain possession under pressure, Clarke may shift toward a more direct, counter-attacking setup for the next qualifying cycle.

What does Billy Gilmour earn per week?

Napoli wage structure

Reports from Italian sports outlets indicate Gilmour’s weekly wage at Napoli falls between £50,000 and £60,000. Exact details have not been published by the club. At Brighton, he was reportedly earning around £40,000 per week (Capology (football salary database)).

Comparison with Brighton and Chelsea salaries

His Chelsea salary was reported at approximately £80,000 per week, meaning his earnings have decreased significantly since leaving Stamford Bridge in 2022. The Chelsea wage bill under Roman Abramovich was famously bloated, and Gilmour’s £80,000 figure reflected the club’s policy of paying young players high base salaries.

The pattern: each transfer has brought a lower base wage but a clearer path to playing time — a trade-off that has not yet produced the desired minutes.

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The fan frenzy that greeted his arrival in Naples alongside Scott McTominay is captured in this article on his Napoli move.

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