Díaz was a fan of rivals Guadalajara. He played for an academy of Real Madrid based in Mexico and later moved to Club America's academy. A product of América's academy programme, Díaz made his debut for the club in Liga MX on 22 November 2014 as an 84th-minute substitute in a 2–1 loss to Atlas.[1] On 8 April 2015, he scored his first goal for the club in CONCACAF Champions League in a 6–0 win over Costa Rican side Herediano.[1] That season, he made a total of three league appearances, one appearance in the Copa MX and two appearances in Champions League.[1] The following season, he made one league appearance and one appearance in Champions League.[1]
Loan to Necaxa
On 8 June 2016, Díaz was loaned to Necaxa until the end of the season.[2] He made twelve league appearances that season, one in the Liguilla Apertura and five in the Copa MX.[1] His only goal for Necaxa came in a 5–1 Copa MX victory over Potros UAEM.[1]
Return to América
Diaz returned to America for the 2017–2018 campaign, where he was finally promoted to América's first team on a regular basis.[3] He made eighteen league appearances that season, four in the Liguilla Apertura, five in the Copa MX and two in Champions League, scoring a goal in the league and another in Champions League against Panamanian side Tauro.[1]
Loan to Atlas
In the 2018–19 season, Díaz was loaned to Atlas, where he made eleven league appearances and two Copa MX appearances, but failed to score.[1]
Loan to Zacatepec
On 5 August 2019, Díaz was loaned to Ascenso MX side Zacatepec.[4] That season, he made three league appearances, three appearances in the Liguilla Apertura and three appearances in the Copa MX, but again failed to score.[1]
On 6 February 2020, Díaz signed with Canadian Premier League club Pacific FC.[5] He made his debut on August 15 against the HFX Wanderers.[6] He scored his first goal for the club on August 25, in a 2–0 victory over Valour FC.[7] On July 21, 2021, Díaz scored his first hat-trick with Pacific FC in a 4–2 win over Atlético Ottawa.[8] That season, he scored 10 goals and helped lead the club to their first ever league championship.[9] After the title-winning 2021 season, it was rumoured that Díaz would depart the club, but he returned for 2022. His 2022 with Pacific was very successful, as he scored 13 goals in 18 league matches, factoring into the golden boot race. As league champions, Pacific also got to participate in the 2022 Concacaf League, and in the second leg their first ever continental matchup Díaz scored a hat trick against Waterhouse, helping to ensure Pacific advanced.[10] When Díaz departed the club midseason, he was the leading scorer in the league, with 13.[11]
In 2013, Díaz played for the under-17 squad at the 2013 CONCACAF U-17 Championship, making five appearances and scoring one goal against Cuba as Mexico went on to win the tournament.[1] At the 2013 FIFA U-17 World Cup he again featured heavily for Mexico, making seven appearances and scoring goals against Iraq and Italy on route to a finals run in which Mexico lost 3–0 to Nigeria.[1]
In 2015, Díaz represented the under-20 side at the 2015 CONCACAF U-20 Championship, making five appearances as Mexico went on to win the tournament.[1] He scored four goals, the first two coming in a 9–1 victory over Cuba, the third in a 3–0 win over Honduras and the fourth in a 3–1 win over El Salvador.[1] At the 2015 FIFA U-20 World Cup, Díaz made appearances against Mali and Serbia as Mexico were knocked out in the group stage.[1]
