[5] In 2021, he began attending California State Polytechnic University, Pomona, where he played for the men's soccer team.

[2] In 2022, he began playing with Flash FC in the United Premier Soccer League,[12] and in 2023 he helped them reach the semi-finals of the UPSL SoCal Regional Cup, scoring four goals.

[13] In February 2023, Martínez signed with Vancouver FC of the Canadian Premier League, after participating in the club's open trials.

[19] While in high school, he attracted the attention of the Belize youth national team, playing with them and having plenty of success.

[21] Martinez founded the Pele Soccer Foundation in his native country of Belize, which teaches youth the fundamentals of football, collects new clothes and equipment for the children, and instills the importance of pursuing an education.