All-Time Men's U20 Results
Prior to 2022, the World Lacrosse U20 World Championship age grouping was U19. For 2022, the championship was U21 due to COVID delays for the scheduled championship year.
1988 ILF World Championship (Adelaide, Australia)
| Opponent | Round | Result |
|---|
| Canada | Pool Play | W 16-4 |
| Australia | Pool Play | W 20-12 |
| England | Pool Play | W 16-7 |
| Canada | Championship | W 12-5 |
1992 ILF World Championship (Long Island, New York)
| Date | Opponent | Round | Result |
|---|
| July 31 | Australia | Pool Play | W 14-9 |
| August 1 | Japan | Pool Play | W 23-2 |
| August 2 | Iroquois Nationals | Pool Play | W 28-6 |
| August 4 | Canada | Pool Play | W 22-6 |
| August 6 | England | Pool Play | W 25-4 |
| August 8 | Australia | Championship | W 24-11 |
1996 ILF World Championship (Tokyo, Japan)
| Date | Opponent | Round | Result |
|---|
| August 4 | Australia | Pool Play | W 17-8 |
| August 5 | Canada | Pool Play | W 24-3 |
| August 6 | Iroquois Nationals | Pool Play | W 23-9 |
| August 8 | Japan | Pool Play | W 30-4 |
| August 9 | Iroquois Nationals | Semifinals | W 27-10 |
| August 11 | Australia | Championship | W 13-8 |
1999 ILF World Championship (Adelaide, Australia)
| Date | Opponent | Round | Result |
|---|
| July 2 | Australia | Pool Play | W 18-3 |
| July 3 | England | Pool Play | W 22-3 |
| July 4 | Iroquois | Pool Play | W 9-8 |
| July 6 | Canada | Pool Play | W 12-9 |
| July 7 | Japan | Pool Play | W 26-4 |
| July 8 | England | Semifinals | W 13-11 |
| July 10 | Canada | Championship | W 14-7 |
2003 ILF World Championship (Towson, Md.)
| Date | Opponent | Round | Result |
|---|
| June 27 | Australia | Pool Play | W 16-6 |
| June 28 | Canada | Pool Play | W 14-10 |
| June 29 | Iroquois Nationals | Pool Play | W 14-6 |
| July 1 | England | Pool Play | W 22-3 |
| July 3 | England | Semifinals | W 21-6 |
| July 5 | Canada | Championship | W 19-10 |
2008 FIL World Championship (Coquitlam, Canada)
| Date | Opponent | Round | Result |
|---|
| July 3 | Iroquois Nations | Pool Play | W 20-15 |
| July 4 | Australia | Pool Play | W 21-7 |
| July 5 | Japan | Pool Play | W 27-0 |
| July 6 | Canada | Pool Play | W 16-15 |
| July 7 | England | Pool Play | W 24-4 |
| July 10 | Japan | Semifinals | W 25-5 |
| July 12 | Canada | Championship | W 19-12 |
2012 FIL World Championship (Turku, Finland)
| Date | Opponent | Round | Result |
|---|
| July 13 | Australia | Pool Play | W, 24-6 |
| July 14 | Canada | Pool Play | L, 9-11 (OT) |
| July 15 | England | Pool Play | W, 20-1 |
| July 17 | Iroquois Nationals | Pool Play | L, 13-15 |
| July 18 | Germany | Quarterfinals | W, 22-2 |
| July 19 | Iroquois Nationals | Semifinals | W, 12-7 |
| July 21 | Canada | Championship | W, 10-8 |
2016 FIL World Championship (Coquitlam, Canada)
| Date | Opponent | Round | Result |
|---|
| July 8 | Canada | Pool Play | W, 12-5 |
| July 9 | Australia | Pool Play | W, 13-4 |
| July 11 | Iroquois Nationals | Pool Play | W, 17-3 |
| July 12 | England | Pool Play | W, 19-6 |
| July 14 | Australia | Semifinals | W, 23-1 |
| July 16 | Canada | Championship | W, 13-12 |
2022 World Lacrosse Championship (Limerick, Ireland)
| Date | Opponent | Round | Result |
|---|
| Aug. 10 | Canada | Pool Play | W, 7-5 |
| Aug. 11 | England | Pool Play | W, 17-3 |
| Aug. 13 | Haudenosaunee | Pool Play | W, 13-2 |
| Aug. 15 | Australia | Pool Play | W, 17-2 |
| Aug. 17 | Puerto Rico | Quarterfinals | W, 21-3 |
| Aug. 18 | Haudenosaunee | Semifinals | W, 10-2 |
| Aug. 20 | Canada | Championship | W, 12-10 |
* The 2022 world championship used the U21 age grouping due to postponements related to the COVID-19 pandemic.
2025 World Lacrosse Championship (Jeju Island, Korea)
| Date | Opponent | Result |
|---|
| Aug. 16 | Canada | W, 7-6 |
| Aug. 17 | Haudenosaunee | W, 14-3 |
| Aug. 19 | Australia | W, 18-1 |
| Aug. 21 | Quarterfinals: vs England | W, 26-0 |
| Aug. 22 | Semifinals: vs. Haudenosaunee | W, 19-5 |
| Aug. 24 | Championship: vs. Canada | L, 5-6 |
