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 World Rugby Under 20 Championship is an international rugby union competition. The event is organised by the sport's governing body, World Rugby, and is contested by 12 men's junior national teams with an under-20 age requirement. This event replaced the IRB's former age-grade world championships, the Under 19 and Under 21 World Championships.
The World Rugby Under 20 Trophy is an international rugby union competition. The event is organised by the sport's governing body, World Rugby, and is contested by 8 men's junior national teams with an under-20 age requirement. This event replaced the World Rugby's former age-grade world championships, the Under-19 and Under-21 World Championships.
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 Canada under 20 rugby team is the junior national rugby union team from Canada. It replaced the two former age grade teams, the under 19s and under 21s, in 2008. The team competed at the IRB Junior World Championship in 2008 and 2009 but were relegated to the IRB Junior World Rugby Trophy for 2010. The team has yet to make their way back to the top competition.
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 Fiji national under 20 rugby team is for Fijian rugby union players aged 20 or under on January 1 of the year during which they are selected.
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 Romania national under-20 rugby union team is Romania's junior national team in rugby union. They have represented Romania in the IRB Junior World Rugby Trophy, now known as the World Rugby U20 Trophy but have not yet participate in the World Rugby U20 Championship. They participated in the first three Junior World Trophies, winning it in 2009, and in 2018 they hosted of the World Rugby U20 Trophy for the first time.
Gabriel Farley is a rugby league and rugby union player who plays for the Austin Gilgronis in Major League Rugby (MLR).
The 2015 World Rugby U20 Trophy was the eighth annual international rugby union competition for Under 20 national teams, second-tier world championship. A total of 8 nations played in the tournament.
The UruCup is a rugby union competition that was first held in 2015 at the Estadio Charrúa in Montevideo with Charrúas XV, Argentina Jaguars, South American XV, Chile, Uruguay U20 and Argentina U20 taking part.
The Cook Islands national Under 20 rugby team is for Cook Islands rugby union players aged 20 or under on January 1 of the year during which they are selected. The team has played at the World Rugby U20 Trophy and also competes at the Oceania U20 Championship.
The Papua New Guinea national under-20 rugby union team is for Papua New Guinean rugby union players aged 20 or under on January 1 of the year during which they are selected. The team has played at the World Rugby U20 Trophy and also competes at the Oceania U20 Championship as of 2015.
Uruguay 67–8 South Korea 
New Zealand 75–0 Uruguay 
