The Wales national Under 20 rugby team is for Welsh rugby union players aged 20 or under on 1 January of the year during which they are selected.
The New Zealand national under-20 rugby union team, nicknamed the Baby Blacks, is the representative rugby union team from New Zealand. It replaced the two former age grade teams: the under-19s and the under-21s. Their first tournament was the 2008 IRB Junior World Championship, which they won after defeating England 38–3 in the final. They have gone on to also win the World Rugby Under 20 Championship in 2009, 2010, 2011, 2015 and 2017. The team also competes in the Oceania U20 Championship as of 2015. The New Zealand under-20s have been nicknamed the "Baby Blacks" after the youthful All Blacks side which played in 1986.
The England Under 20 rugby team are the newest representative rugby union team from England. They replace the two former age grade teams Under 19s and Under 21s. They compete in the annual Six Nations Under 20s Championship and World Rugby Under 20 Championship.
The Ireland national under-20 rugby team was formed in 2006, having previously been known as the under-21 team.
The France national under-20 rugby union team, also known as France under-20s or France U20(s), is the national under-20 rugby union team of France, under the control of the French Rugby Federation. Competing in the annual Six Nations Under 20s Championship, it is considered to be the feeder team for the France national team.
The Australia national under-20 rugby union team, nicknamed the Junior Wallabies, is the national under-20 rugby union team that represents Australia. The team has been competing at the annual World Rugby U20 Championship since it began in 2008, replacing the previously held under-19 and under-21 championships. The team also competes at the Oceania U20 Championship as of 2015 and the U20 Rugby Championship since 2024.
The South Africa national under-20 rugby union team are South Africa's junior team at national level. They have been competing in the World Rugby Under 20 Championship since its inception in 2008. This Under-20 tournament replaced the previously-held Under-19 and Under-21 Rugby World Championships. Prior to 2018, it had been the country's "next senior" (second-level) 15-man national side, but World Rugby no longer allows member unions to designate age-grade sides as "next senior" teams.
The United States national under-20 rugby union team, for sponsorship reasons known as the AIG Men's Junior All-Americans, is the United States' junior rugby team at the national level. The U-20 team has competed at the IRB Junior World Championship and at several IRB Junior World Rugby Trophy tournaments.
The Samoa under-20 rugby union team is Samoa's junior national team. They represent Samoa at the IRB Junior World Championship. After the 2010 Junior World Championship they were relegated to the Junior World Rugby Trophy for second tier nations. They were later promoted to the 2012 Junior World Championship after finishing as winners of the 2011 IRB Junior World Rugby Trophy. The team also competes at the Oceania U20 Championship as of 2015.
The Scotland national under-20 rugby union team participates in the World Rugby Under 20 Trophy. Their highest placement is 5th which they achieved in the 2017 World Rugby Under 20 Championship.
The Italy national under-20 rugby union team has competed in both the IRB Junior World Championship and IRB Junior World Rugby Trophy. They were one of four teams relegated in 2009 to the Junior World Trophy after finishing at the bottom of the tournament. They were again promoted to the 2011 IRB Junior World Championship after winning the 2010 IRB Junior World Rugby Trophy.
The Japan national under-20 rugby union team is Japan's junior national team in rugby union.
The Georgia national under-20 rugby union team is Georgia's junior national team.
The Uruguay under 20 rugby team is the junior national rugby union team from Uruguay. They replace the two former age grade teams Under 19s and Under 21s. The team competed at the World Rugby Under 20 Championships and World Rugby U20 Trophy.
The Oceania Rugby Under 20 Championship is an international rugby union competition organised by Oceania Rugby, which is the regional governing body for rugby in Oceania. It is contested by men's junior national teams with an under-20 age requirement, and played as two tournaments: the Oceania Championship for teams that qualify for the World Championship; and the Oceania Trophy for teams aiming to compete in the World Rugby U20 Trophy.
Hyron Diego Andrews is a South African rugby union player for the Sharks in Super Rugby and in the Currie Cup. His regular position is lock.
Retshegofaditswe 'Tshego' Nché – more commonly referred to as Ox Nché – is a South African rugby union player for the Sharks in the United Rugby Championship and the South African national team the Springboks. His regular position is prop, and he is one of the world’s most revered scrummagers.
Brandon Terry Thomson is a South African rugby union player, currently playing with Italian Serie A Elite team Rovigo Delta. His regular position is fly-half.
The Spain national under-20 rugby union team is the junior national rugby union team from Spain. The team competed at the World Rugby U20 Trophy.
Andrew Gerald Porter is an Irish professional rugby union player who plays as a prop for United Rugby Championship club Leinster and the Ireland national team. He was selected for the British and Irish Lions tour of South Africa in 2021.
José Pellicena
New Zealand 60–0 Argentina 
