Martinez helped Atlanta United win the U.S. Open Cup and Campeones Cup in 2019. The team reached the finals of the Eastern Conference playoffs.
Martinez finished his career at Atlanta United with 11 goals and 16 assists across all competitions.
Atlanta United President Darren Eales said the club will take the revenue from the sale of Martinez and apply it toward purchasing another Designated Player, likely an attacking midfielder.
The club is 0-0-2 since the sale of Martinez was announced. It will play at Inter Miami on Wednesday. Atlanta United is 3-4-2 this season and in eighth place in the Eastern Conference.