In the summer of 2017, Óscar Guido Trejo went back to Rayo Vallecano from French side Toulouse, six years after a loan spell in Vallecas. Born in Santiago del Estero, Argentina, on 26 April 1988 and nicknamed “Chocota”, the attacking midfielder stayed at the Madrid club until 2026. In that time he won two promotions to the Spanish top flight, captained the side and played in the first European final in Rayo’s history.
From Santiago del Estero to Boca Juniors
Trejo started out at Club Atlético Estrella Roja, near the neighbourhood where he grew up, and then joined the Boca Juniors academy. He made his first-team debut in July 2005 in a 3-2 defeat to Almagro and scored in that same game. It was his only competitive appearance for Boca. In late 2006 he left for Mallorca without having signed a professional contract. Boca objected and took the case to FIFA, which ruled in favour of the Balearic club in 2007.
Mallorca, Elche and a first spell in Vallecas
He made his La Liga debut on 8 April 2007 against Getafe. He came on in the 90th minute and scored in a 2-0 home win. In 2007-08 he also scored in the Copa del Rey against Real Madrid, in a 2-1 win for Mallorca. With few chances in the first team, he was sent out on loan twice. In 2009-10 he played 35 competitive games for Elche in the Spanish second division and scored four goals. In 2010-11 he joined Rayo Vallecano on loan and scored ten goals in 41 games. Rayo finished second and went up to the top flight, with promotion sealed against Xerez on 22 May 2011.
Sporting Gijón and Toulouse
In the summer of 2011 Mallorca sold him to Sporting Gijón. He was a regular starter in his first season, with four goals in 33 league games, but the Asturian club were relegated in 2012. Sporting missed out on promotion in 2012-13, and in July 2013 Trejo signed for Ligue 1 side Toulouse. His first goal in France came on 18 October 2013 in a 2-1 win over Reims. He spent four seasons in France, with 136 competitive games and 14 goals, mostly in relegation battles.
His return to Vallecas in 2017 brought the best scoring season of his career. In 2017-18 he scored 12 goals, a career high, and alongside Raúl de Tomás helped Rayo win the Spanish second division title and return to the top flight. After another relegation, Rayo went back up in 2021 with Trejo as captain. They knocked out Leganés in the play-off semi-finals and then beat Girona in the final at Montilivi, the first promotion the club had ever won away from Vallecas.
The captaincy and the 2023 protest
On 1 October 2023 he gave up the captaincy in protest. In a statement he said he disagreed with the way the club treated its staff and supporters, at a time of open conflict between fans and president Raúl Martín Presa over ticketing and the state of the stadium. He made clear that playing time had nothing to do with it, even though injuries had held him back at the start of that season. In December 2024 he reached 303 competitive appearances for Rayo, the sixth-highest total in the club’s history.
Foundation, farewell and a European final
Off the pitch, in 2012 he set up the Chocota Trejo Foundation, which helps children from vulnerable families in Santiago del Estero. In March 2026 he announced that he would leave Rayo at the end of the season. On 17 May 2026 he played his last home game, a 2-0 win over Villarreal, with a tribute from the stands and a guard of honour from both teams. His time at the club ended with the Conference League final, Rayo’s first European final, which they lost 1-0 to Crystal Palace in Leipzig on 27 May 2026. In June 2026 he announced his retirement from playing.
