Sheff Utd U21
Millwall U21
Swansea U21
Peterborough U21
Crewe U21
Hull U21
Bristol City U21
Charlton U21
QPR U21
Coventry U21
Cardiff U21
Colchester U21
Barnsley U21
Sheffield Wed U21
Watford U21
Wigan U21
Birmingham U21
Bournemouth U21
Ipswich U21
Burnley U21
Fleetwood Town U21
Brentford U21
Reading U21
Huddersfield U21
Leeds U21
The Professional Development League is a system of English youth football leagues that are managed, organised and controlled by the Premier League or by the Football League. It was introduced by the Football Association via the Elite Player Performance Plan in 2012.
The system was introduced in early 2012 and was active for the first time during the 2012–13 season. It is a successor to the Premier Reserve League, Premier Academy League and Football Combination. The Football League Youth Alliance makes up League 2 of the under-18 system. The system covers the under-18 and under-21 groups.
Previously, clubs participating in the Premier Reserve League (the highest level of reserve football in England) were removed from the competition if their first team in the Premier League were relegated and replaced with a promoted team. Under the Professional Development League system, Premier League reserves teams' league status is not directly linked to the first team's Premier League status. Instead, there are three different Professional Development Leagues at each age-group level and clubs in the top four tiers of the English football league system are placed in the system based on the assessment of their academy for the Elite Player Performance Plan.