List of world cups and world championships for juniors and youth Men Men

| Sport | Competition_name | Competing_entities | Age_groups | Held_every |
|---|---|---|---|---|
| Baseball | World Junior Baseball Championship | Nations | Under-18 | One year through 2000, now two years |
| Baseball | World Youth Baseball Championship | Nations | Under-16 | One year through 1998, two years starting in 2001 |
| Baseball | Big League World Series | Communities | 16-18 | One year |
| Baseball | Senior League World Series | Communities | 14-16 | One year |
| Baseball | Junior League World Series | Communities | 13-15 | One year |
| Baseball | Little League World Series | Communities | 13 or younger | One year |
| Basketball | FIBA Under-21 World Championship | Nations | 21 or younger | Four years until 2005 |
| Basketball | FIBA Under-19 World Championship | Nations | 19 or younger | Four years until 2007, now two years |
| Basketball | FIBA Under-17 World Championship | Nations | 17 or younger | Two years |