2018 (S2): Diaz made his S2 debut on September 5 vs. Tulsa Roughnecks FC and played 31 minutes. He scored his first professional goal on October 10, tallying a late equalizer in a 2-2 draw with Colorado Springs Switchbacks FC. In his next match, a 4-1 road win over Tulsa Roughnecks FC on October 13, Diaz posted a goal and two assists.
2018 (Sounders Academy): The forward scored 36 goals in 38 games across all competitions as the Sounders FC U-17 squad won the USSDA National Championship.
Signed to Tacoma Defiance’s roster on Oct. 2, 2018