Gustavo Caballero

Deportivo Capiatá

A Deportivo Capiatá youth graduate, Caballero signed his first professional contract on 1 July 2019. He made his debut in the Paraguayan Primera División on 12 July, starting for in a 1–0 home win over Sportivo Luqueño. Caballero featured in seven league matches for Capiatá during the 2019 season, as the club suffered relegation, and also helped the side to reach the semifinals of the 2019 Copa Paraguay.

Sportivo Ameliano

After the 2020 season was cancelled due to the COVID-19 pandemic, Caballero also spent the 2021 campaign unemployed before going on a trial at Sportivo Ameliano in January 2022; initially a member of the reserve team, he impressed during the pre-season and earned himself a first team spot. He scored his first professional goal on 20 March 2022, netting the opener in a 2–0 away win over Olimpia. Caballero contributed with two goals and two assists in 12 matches for Ameliano during the 2022 Apertura tournament.

Nacional Asunción

In July 2022, Caballero joined Nacional Asunción, who had been in irregular form and mid-table positions in the first half of the season. In his second match for La Academia on 25 July, he scored his first goal in a 2–1 win at 12 de Octubre. On 28 February 2023, Caballero scored his first continental goal in the Copa Libertadores, albeit in a 5–1 loss away to Sporting Cristal of Peru, eliminating his side 5–3 on aggregate; he was soon afterwards demoted to the reserve team as a punishment…

Under-23 team

Caballero made his debut for the Paraguay national under-23 team on 8 June 2024, as a substitute in a 4–0 friendly loss to neighbours Argentina. He was named in the squad for the 2024 Olympic event in France, but was moved to standby after veteran Fabián Balbuena received late permission from Dynamo Moscow. Caballero was restored to the team days later when Fabrizio Peralta was denied permission by his Brazilian club Cruzeiro, and then dropped again as Julio Enciso was allowed to play by Brighton & Hove Albion. On the day before the tournament, he was finally reinstalled in the squad when Diego González suffered an injury. He played in all three matches in the group stage, but was an unused substitute in Paraguay's quarterfinal loss to Egypt.

Senior team

In March 2026, Caballero was called up to the Paraguay national team for friendly matches away to Greece and against Morocco in France. He made his debut on 27 March in a 1–0 win over Greece as a substitute for the last 22 minutes, and four days later at the Stade Bollaert-Delelis in Lens, he came off the bench to score a consolation goal in a 2–1 loss to Morocco. On 1 June 2026, Caballero was included in Gustavo Alfaro's 26-man squad for the 2026 FIFA World Cup.

Club

As of 8 September 2026

International

As of match played 4 July 2026

Scores and results list Paraguay's goal tally first.