Swansea City Association Football Club Under-23s is the most senior team of Swansea City's youth teams and are the club's former reserve team.
 From the 2015–16 season, they will play in Division 2 of the Professional Development League 1 and will also compete in the U21 Premier League Cup.
 The Under-21s and Under-18s previously played in the Professional Development League 2 South Division.
 The Under-21s play the majority of their home games at Swansea City's Youth Academy in Landore, Swansea with occasional matches taking place at the Liberty Stadium.
Matthew Olosunde (born March 7, 1998) is an American soccer player who plays for Manchester United U23s as a right-back.
The Aston Villa Under-23, formerly Aston Villa Under-21 and Aston Villa Reserves, are the most senior youth development team of Aston Villa and compete in Premier League 2 (Division 2) of the Professional Development League and the Premier League International Cup in the 2016–17 season.
 The team were part of the FA Premier Reserve League since its foundation in 1999 and were winners of the 2011-12 Premier Reserve League South title, the last in that format.
 The team plays its home games at Villa Park and Bescot Stadium (home of Walsall F.C.).
 Aston Villa also have an academy side that competes in the Under-18 division of the Professional Development League and the FA Youth Cup annually.
Liverpool F.C. Reserves is the reserve team of Liverpool.
 It is the most senior level of the Liverpool academy beneath the first team.
 In the summer of 2012, the whole English reserve football system was overhauled and replaced with an Under 21 league system, the Professional Development League.
 Liverpool's Reserve team became the Liverpool under 21 team and competes in the Professional Development League 1 which is also known by its sponsorship name of Barclays under 21 Premier League.
 The team generally consists of Under-21 players at the club but at times senior players also play for the reserves when they are recuperating from injury.
 Following the introduction of new regulations from 2012–13 season, only three outfield players and one goalkeeper over the age of 21 can play for the reserves regularly.
The 2013–14 Professional U21 Development League (League 1 referred to as the Barclays Under 21 Premier League for sponsorship reasons) was the second season of the Professional Development League system.
The 2013–14 Professional U18 Development League (League 1 referred to as the Barclays Under 18 Premier League for sponsorship reasons) is the second season of the Professional Development League system.
Manchester United Football Club Under-23s is the most senior of Manchester United's youth teams and the club's former reserve team.
 They play in the Premier League 2, the highest tier of the Professional Development League.
 The team is effectively Manchester United's second-string side, but is limited to three outfield players and one goalkeeper over the age of 23 per game following the introduction of new regulations from the 2016–17 season, an increase from the age of 21 which was introduced in 2012–13.
The 2012–13 Professional U18 Development League (League 1 referred to as the Barclays Under 18 Premier League for sponsorship reasons) is the first season of the Professional Development League system.
Brentford F.C. Reserves was the reserve team of Brentford.
 The reserve team played at varying times from 1900 until 2011.
 In the Summer of 2012, the English reserve football pyramid and youth system was overhauled under the Elite Player Performance Plan and replaced with a new Academy system and development leagues.
 Brentford's reserve team was relaunched as the Brentford Development Squad in 2011 and in 2012 began competing in Professional Development League 2 South.
 The club withdrew from the Elite Player Performance Plan and Professional Development League after closing the academy in May 2016 and launched a new Brentford B team.
The 2012–13 Professional U21 Development League (League 1 referred to as the Barclays Under 21 Premier League for sponsorship reasons ) was the inaugural season of the Professional Development League's U21 competition.

Question: Matthew Olosunde plays for which tier of the Professional Development League? 
Answer: Premier League 2