[2] He played for Wagiya SC of the Premier League of Belize through the end of the opening round of the 2023–24 season.
[4] In January 2024, prior to the start of the second half of the season, Martínez moved to league rivals Verdes FC.
Soon thereafter, he scored the game-winning goal in a victory over Benque Viejo United FC in the Western Championship, a knock-out tournament to determine the top club in the Cayo District.
He scored one goal against the British Virgin Islands and a hat-trick against Anguilla during the ultimately unsuccessful qualifying campaign.
[10][11] Martínez received his first senior international call-up in March 2024 for a pair of friendlies against Puerto Rico at home.