2019: 4 GP, 2 GS, 0 G, 0 A in 142 min.
Acquired by Bethlehem Steel FC via loan on January 4, 2019. Díaz made his Steel FC debut with a start in the club's season-opening match at Birmingham (March 10) and then came on as a second-half substitute in the match against Charleston (April 13). He returned to the starting lineup in the match against Indy (April 20) and made a substitute appearance at Loudoun (May 3).
2018: Joined Tauro FC's First Team. Díaz scored one goal in two matches. He helped Tauro FC's reserve squad to a first place finish in the Apertura season and scored eight goals across the Apertura and Clausura seasons.
2017: Returned to Tauro FC's reserve team, leading the club to first place finishes in the Apertura and Clausura seasons. He scored 20 goals across both seasons and earned MVP and Golden Boot honors during the Apertura, striking home 12 goals.
2016: Joined Tauro FC (Panama) as part of the club's reserve team in the 2016 Apertura season. Díaz scored six goals in the club's 2016 campaign, assisting the reserve side in finishing in first place.
2018: Díaz featured for Panama’s Under-20 National Team during the 2018 CONCACAF U-20 Championship, scored four goals and provided three assists in four starts during the competition. Diaz started in Panama’s matches against Guadalupe (November 2), Canada (November 6), El Salvador (November 13) and Mexico (November 19), notching braces in the matches against Guadalupe and Canada. The forward’s performances helped Panama’s U-20s go undefeated in the competition with only one draw across all matches and qualify for the FIFA U-20 World Cup Poland 2019.