As an amateur he competed at the 2012 and 2016 Summer Olympics, whilst also winning medals at the 2013 World Championships and the 2015 and 2019 Pan American Games.

[1][2][3][4] London 2012 Rio 2016 Almaty 2013 Doha 2015 Toronto 2015 Lima 2019 On 6 July 2019, Maestre made his professional debut against Jeovanis Barraza.

Maestre won via technical knockout after knocking his opponent down twice in the second round which resulted in referee, Guillermo Perez Pineda, stepping in to stop the bout.

Maestre took control of the fight in the fourth round and dropped his opponent multiple times, which forced the corner of Chaves to throw in the towel.

Maestro secured victory by knocking out his Mexican opponent in the opening minute of the first round after landing a heavy left uppercut.