Júnior Enrique Díaz Campbell (born 12 September 1983) is a Costa Rican former professional footballer who played as a left-back.

[8] Júnior Díaz made his Costa Rica national team debut in a friendly against China on 7 September 2003.

He was crucial in the victory against Italy, as he served a cross to assist Bryan Ruiz's header for the lone goal of the match.

In a note for La Nación, Díaz reflected on the assist, stating that "I am sure that, once I retire, many will summarize my career in one single cross.

"[13] He is a son of former Costa Rica international footballer Enrique Díaz and Yamileth Campbell, who divorced when he was 12.