2017-2018 (Newell’s Old Boys): During the first part of the 2017-2018 season, Valenzuela made nine appearances (seven starts) in Primera Division. He also made two appearances (both starts) for the club in Copa Argentina, Argentina’s domestic cup.
2016-2017 (Newell’s Old Boys): Valenzuela was officially promoted to Newell’s Old Boys first team and made three appearances (three starts) in Primera Division.
2015-2016 (Newell’s Old Boys): Valenzuela made his debut with the club’s first team as a substitute in a Primera Division home match against Club Atletico de San Martin (February 6).
At the international level, Valenzuela has featured for Argentina’s Under-20 squad, earning 10 caps (nine starts). The defender featured in eight of Argentina’s nine matches at the 2017 South American Youth Football Championship, making seven starts while helping Argentina qualify for the 2017 FIFA U-20 World Cup in South Korea. Valenzuela also made two appearances (all starts) in the group stage of the 2017 FIFA U-20 World Cup.
Valenzuela is a product of Newell’s Old Boys youth academy, which he joined at the age of 14. He made his debut with Newell’s Old Boys first team at the age of 17.
Valenzuela is the son of Mauricio and Andrea, and he is an only child. In his spare time, he likes to remain active and practices Pilates, rides his bicycle and jogs. One of his favorite hobbies is playing billiards. Valenzuela likes to watch action movies and comedies, with his favorites being Fast and Furious films. He listens to cumbia and cumbia santafesina, His favorite musician is Leo Mattioli. Valenzuela enjoys reading all types of books. His favorite meal is an Argentine asado. Growing up, he looked up to Argentine forward Carlos Tevez. Valenzuela speaks Spanish and some English.