Slonina, 14, signed his contract in March, becoming the Fire's youngest ever signing and the league's second-youngest, behind only Freddy Adu. He was called into the US U-15's first camp of 2019 earlier this year. He has featured for the Fire's academy at the U-14, U-15 and U-17 levels.
Joining him on the roster are five players who recently featured in 2019 Generation adidas Cup. The three players played in the Under-15 MLS-Liga MX Challenge, which MLS won. The five players are John Carlos Cortez (New York Red Bulls), Brandan Craig (Philadelphia Union), Kenan Hot (New York Red Bulls), Antonio Leone (LAFC) and Evan Rotundo, who was a guest player on LAFC for the tournament.
The US U-15 team will face Slovenia, Mexico and India in group play at the tournament.
US Under-15 Boys National Team Roster
|GK||Damina Alguera||De Anza Force|
|GK||Gabriel Slonina||Chicago Fire|
|D||John Carlos Cortez||NY Red Bulls|
|D||Brandan Craig||Philadelphia Union|
|D||Hans Leza||Houston Dynamo|
|D||Angel Martinez||Seattle Sounders|
|D||Devan Tanton||UE Cornella|
|M||Kenan Hot||NY Red Bulls|
|M||Nicolas Perez Guillen||Toluca|
|M||Allan Rodriguez||Chicago Fire|
|M||Evan Rotundo||San Diego Surf|
|M||Leonardo Torres||San Antonio FC|
|M||Aethan Yohannes||AZ Alkmaar|
|F||Austin Brummett||Seattle Sounders|
|F||Osvaldo Cisneros||Sporting KC|
|F||Cesar Cordova||Houston Dynamo|
|F||Luca Koleosho||CF Reus Deportiu|
|F||Federico Oliva||Atletico Madrid|