A Premier League club can register a maximum of 25 senior players. But that does not necessarily describe the full squad available to its manager.
Under the Premier League’s 2025/26 rules, eligible U21 players could be used in addition to the senior list. For clubs with young players capable of contributing regularly, that creates something valuable: first-team playing capacity without occupying another senior squad place.
FIVDA’s analysis of those eligibility rules alongside completed FBref playing-time data reveals just how differently clubs used that capacity. West Ham received 7,591 Premier League minutes from U21-eligible players in 2025/26. Leeds received just 39.
The same 25-player senior limit therefore produced very different effective player pools.
The Premier League’s 25-man limit isn’t quite what it seems
The U21 exemption provides two distinct forms of value. There is playing value — what an eligible footballer contributes on the pitch — and registration value, because those minutes can be supplied without using one of the maximum 25 senior places.
That distinction changes how we should think about U21 players within Premier League squads. This is not simply a question of which clubs give young players the most opportunities. It is about how much usable first-team capacity clubs obtain from footballers sitting outside the senior limit.
The differences in 2025/26 were substantial. FIVDA’s analysis of the Premier League eligibility rules and FBref player data found that West Ham led the competition with 7,591 U21-eligible minutes, followed by Sunderland on 7,428 and Brighton on 7,169.
Figure 1 — Which clubs actually used the U21 exemption?
At the other end, Liverpool received 584 such minutes and Leeds only 39. The exemption was available across the league; the amount of first-team playing time clubs obtained from it was anything but equal.
West Ham extracted more U21 minutes than anyone
West Ham’s 7,591 minutes represented 20.2% of all available player-minutes across their league season. Mateus Fernandes contributed 3,016 minutes and El Hadji Malick Diouf another 2,707.
Those are not peripheral contributions. Two U21-eligible players carried substantial first-team workloads while remaining outside the senior squad limit.
Sunderland were close behind. Their 7,428 U21 minutes accounted for 19.7% of available playing time, while Brighton reached 7,169 and 19.1%. Across all three clubs, roughly one minute in every five was supplied by an eligible U21 footballer, based on FIVDA’s calculations from the Premier League squad rules and FBref playing-time data.
Figure 2 — Share of Playing Time Supplied by U21-Eligible Players
That is a significant addition to the conventional picture of squad construction. A senior list tells us how many registered senior players a club has. It does not tell us how much of the season is being carried by footballers who do not need to occupy those places.
Sunderland and Brighton turned the exemption into genuine squad depth
High U21 totals can also be created in different ways.
Sunderland spread their minutes among several meaningful contributors. Noah Sadiki played 2,889 minutes, Chemsdine Talbi 1,561 and Habib Diarra 1,405, while Chris Rigg and Eliezer Mayenda both exceeded 750. Sunderland’s U21 contribution therefore extended beyond one regular starter.
That distribution adds another layer to FIVDA’s previous analysis of how Sunderland integrated a large recruitment class without continually changing their first-choice team.
Brighton showed a similarly distributed pattern. Yankuba Minteh contributed 2,391 minutes, Jack Hinshelwood 1,741 and Carlos Baleba 1,652. Their 7,169-minute total was therefore built from several substantial first-team roles rather than one exceptional U21 player.
That matters because total minutes alone cannot tell us what kind of squad benefit the exemption provided. Two clubs can derive similar quantities of U21 playing time while constructing that contribution in very different ways.
Chelsea and Brentford show two very different ways to use the rule
Chelsea and Brentford provide the clearest example.
Chelsea accumulated 6,692 U21 minutes across 14 players. That breadth also fits the wider youth-focused squad-building model FIVDA examined in our analysis of how Chelsea split their recruitment strategy across two timelines.
Their leading contributor, Alejandro Garnacho, supplied 1,268 minutes — only 18.9% of Chelsea’s total.
Brentford accumulated a relatively similar 6,004 minutes, but almost all of them came from two players. Michael Kayode contributed 3,258 and Yehor Yarmoliuk 2,659. Together, they supplied approximately 98.5% of Brentford’s U21 minutes.
Figure 3 — Exempt Starter or Exempt Squad Depth?
This gives us a useful distinction. Brentford primarily received exempt starter value: major workloads from a very small number of eligible footballers. Chelsea received much more exempt squad depth, spreading playing time across a larger group.
Neither model is inherently better. They simply demonstrate two different ways the same registration mechanism can increase usable first-team capacity.
At some clubs, the exemption barely mattered
The opposite end of the table is just as revealing.
Leeds received only 39 U21-eligible minutes, equivalent to approximately 0.1% of their available player-minutes. Liverpool were at 1.6%, Nottingham Forest at 1.8%, Everton at 2.9% and Aston Villa at 3.1%.
Those figures do not establish that these clubs constructed their squads poorly. They show something narrower: the practical importance of the exemption varied enormously.
Every club had access to the same broad registration mechanism. Having that additional capacity available did not mean a club would necessarily derive meaningful first-team playing time from it.
This isn’t an academy ranking
There is an important limitation to the comparison. U21 eligibility describes registration status under an age criterion, not where a footballer was developed.
A high total should therefore not automatically be interpreted as evidence that a club has the strongest academy or gives home-grown youngsters the greatest opportunities. Clubs can recruit young players who satisfy the eligibility rules and receive the same registration benefit.
Nor does greater U21 usage establish that one squad-building strategy was more successful than another. These numbers do not show that more exempt minutes produced better results, stronger player development or superior recruitment.
What they reveal is more precise: clubs made radically different use of a resource available under the same rules.
What U21 eligibility actually gives a squad
The 25-player limit sounds like a hard definition of squad size. In practice, it is a limit on the senior portion of the squad.
The Premier League’s updated squad lists continued to allow eligible U21 players in addition to the 25-player senior limit after the January transfer window. For clubs with eligible players capable of handling regular Premier League football, that can expand the genuinely usable player pool.
West Ham demonstrated the scale that contribution can reach. Sunderland and Brighton showed how several U21 players can provide meaningful depth. Chelsea spread the benefit across a particularly large group, while Brentford generated a comparable total almost entirely through two regulars. Leeds showed the other extreme.
The hidden squad-building resource
The important number, then, is not simply 25.
Premier League clubs operate within the same senior squad limit, but the number of players capable of contributing meaningful first-team minutes can extend beyond it. The U21 exemption creates that possibility; the 2025/26 data show how differently clubs converted it into actual playing time.
That is why this is better understood as a squad-construction story than a youth-development ranking.
An eligible player capable of carrying thousands of Premier League minutes does more than provide youth representation. He gives his club a usable first-team footballer without consuming one of its senior registration places. Several such players can change the practical depth of a squad considerably.
The rule is the same for everyone. What differed dramatically in 2025/26 was how much football clubs managed to get from the players it allowed them to use.
