He dropped out of school to pursue baseball full-time at eleven years old, by which point he was already playing in international tournaments.

[6] Inspired by fellow Venezuelan catcher Henry Blanco,[7] Álvarez started catching at twelve years old.

On July 4 against the Arizona Diamondbacks, Álvarez hit his 14th home run, a 467-foot shot to dead center off pitcher Miguel Castro.

With this homer, he broke the Mets record for most home runs by a rookie catcher, surpassing Travis d'Arnaud, Jason Phillips, and Todd Hundley.

[34] 2024 On April 20, 2024, Álvarez was placed on the 15-day injured list with a left thumb sprain following a stumble while rounding first base in a game against the Los Angeles Dodgers.

[36] On May 28, five and a half weeks after tearing the ligament, it was announced Álvarez would begin his rehab assignment with the Double-A Binghamton Rumble Ponies.

[40] On August 19, during a game against the Baltimore Orioles, Álvarez hit his first career walk-off home run, off of pitcher Seranthony Domínguez.

[citation needed] When Álvarez came to the United States for his first professional season at 16 years old, his parents accompanied him to help ease the transition.

[4] At that time, he spoke no English, and had to rely on older teammate José Butto to speak the language on his behalf.