You are allowed unlimited guest players. You can not go over your team roster limit with the guest players, 10 for U8, 12 for U9/10, 14 for U11/12, 18 for U13 and 22 for U14 through U19.
Guest players must have player cards issued by your club through USYS or US Club Soccer...you can not mix player cards...so in short you can not have a USYS player card with a US Club Soccer roster or vice versa.
Guest players can't be from a team that is already playing in the tournament.
All guest players must have a medical release.
Guest players must be hand written or previously entered onto the Official Team roster for 2020 - 2021 season year.