4 × 100 metres Medley Relay, Boys
Participants
| Nr. | Athlete | NOC |
|---|---|---|
| 1 | Finlay Knox |  CAN |
| 2 | Josh Liendo | CAN |
| 3 | Alexander Milanovich | CAN |
| 4 | Sebastian Somerset | CAN |
| 5 | Hong Jinquan |  CHN |
| 6 | Shen Jiahao | CHN |
| 7 | Sun Jiajun | CHN |
| 8 | Wang Guanbin | CHN |
| 9 | Sebestyén Böhm |  HUN |
| 10 | Ákos Kalmár | HUN |
| 11 | Kristóf Milák | HUN |
| 12 | Gábor Zombori | HUN |
| 13 | Federico Burdisso |  ITA |
| 14 | Johannes Calloni | ITA |
| 15 | Thomas Ceccon | ITA |
| 16 | Marco De Tullio | ITA |
| 17 | Yu Hanaguruma |  JPN |
| 18 | Shinnosuke Ishikawa | JPN |
| 19 | Taku Taniguchi | JPN |
| 20 | Keisuke Yoshida | JPN |
| 21 | Jan Kałusowski |  POL |
| 22 | Bartłomiej Koziejko | POL |
| 23 | Jakub Kraska | POL |
| 24 | Jakub Majerski | POL |
| 25 | Ethan du Preez |  RSA |
| 26 | Hendrik Duvenhage | RSA |
| 27 | Michael Houlie | RSA |
| 28 | Gabriel Nortje | RSA |
| 29 | Vladislav Gerasimenko |  RUS |
| 30 | Kliment Kolesnikov | RUS |
| 31 | Daniil Markov | RUS |
| 32 | Andrey Minakov | RUS |
| 33 | Will Barao |  USA |
| 34 | Ethan Dang | USA |
| 35 | Ethan Harder | USA |
| 36 | Jake Johnson | USA |