[1] Méndez made his professional debut in 2012 with the Dominican Summer League Rangers, posting a 2–1 record with a 1.99 ERA in 45+1⁄3 innings.

Méndez split the 2014 season between the rookie–level Arizona League Rangers and Single–A Hickory Crawdads, posting a combined 3–1 record with a 2.70 ERA in 36+2⁄3 innings.

[2] Méndez split the 2016 minor league season between the High–A High Desert Mavericks, Double–A Frisco RoughRiders, and Triple–A Round Rock Express.

2 prospect after the Rangers dealt Luis Ortiz and Lewis Brinson to the Brewers for catcher Jonathan Lucroy.

[4] He made his Major League debut on September 5, coming out of the bullpen and allowing five earned runs while pitching one inning against the Seattle Mariners.

He was on the Rangers active roster when on June 19, he was optioned back to Triple–A for violating an unspecified team rule after a game in Kansas City the night prior.

However, on February 15, 2022, prior to the 2022 AA season, his contract was purchased by the Sultanes de Monterrey of the Mexican League.

[18] On December 27, 2024, Méndez signed a one-year, $560,000 contract with the Uni-President Lions of the Chinese Professional Baseball League.