Following the departure of Frankie Amaya to Liga MX side Toluca earlier this window, the Red Bulls have been searching for a replacement in the middle of the park.
They seem to have found their man in Carballo, who has seven international appearances with La Celeste. He broke through with the national team in 2023, but missed out on the Copa America roster this summer.
He'll arrive from Gremio in Brazil, where he made 54 appearances for the Serie A side from 2023 onward.