Alex Mendez

LA Galaxy

Mendez made his professional debut for USL Championship club LA Galaxy II in a 1–0 win against Orange County SC on August 3, 2017, coming on as a 34th-minute substitute for Andre Ulrich Zanga.

SC Freiburg

On October 23, 2018, Mendez announced that he had signed a professional contract for the Bundesliga club SC Freiburg in Germany. Mendez scored three goals in 12 appearances in the U19 Bundesliga.

Ajax

On July 30, 2019, Mendez was signed by Ajax on a three-year deal. He made his official debut playing for the reserves team Jong Ajax in the Dutch Eerste Divisie, the 2nd-tier of professional football in the Netherlands, in a match against N.E.C. which ended in a 3–3 deadlock.

Vizela

On July 3, 2021, it was announced that Mendez would transfer to Portuguese club F.C. Vizela for an undisclosed transfer fee. On August 6, 2021, Mendez made his debut as a starter in the Primeira Liga season opener in a 3–0 loss at home against Sporting CP.

Tampa Bay Rowdies

In September 2025, Mendez joined the Tampa Bay Rowdies of the USL Championship.

El Paso Locomotive

On February 26, 2026, El Paso Locomotive announced they had acquired Mendez via transfer from Tampa Bay Rowdies.

Mendez has been capped by the United States at the under-17, under-20, and under-23 levels. In 2018, Mendez was awarded the Young Player of the Year award for the United States.

Born in the United States, Mendez is of Mexican descent.