Baty returned to Brooklyn to begin 2021.[15] In June, Baty was selected to play in theAll-Star Futures Game.[16] Following the game, he was promoted to theBinghamton Rumble Ponies.[17] Over 91 games between the two teams, he slashed .292/.382/.473 with 12 home runs, 56 RBIs, and 22 doubles.[18] Baty began the 2022 season with Binghamton, and was promoted to theSyracuse Mets in August.[19]
Following injuries toEduardo Escobar andLuis Guillorme, Baty was called up to the major leagues on August 17, 2022.[20] He hit a home run in hisfirst major league at-bat[21] on a curveball fromJake Odorizzi. He became only the fifth Mets player to homer in his first career MLB at bat. Baty ended up going 1-for-4 with two RBIs, including a 113 mph groundout that was the hardest hit ball by a Mets left-handed hitter off a lefty pitcher since 2016.[22] On August 31, Baty underwent surgery to repair a torn ligament in his thumb and missed the remainder of the season.[23]
Baty was optioned to Triple-A Syracuse to begin the 2023 season.[24] He was called up to the Majors on April 17 after batting .400 in 35 at bats with Syracuse. On April 27, during a game against theWashington Nationals, Baty went 3–for–3 with two singles, a walk, 3 RBI, and a home run, a 400-foot solo-shot to center. It was his first career 3-hit game. He became the first Mets third baseman age 23 or younger with three hits in a game sinceWilmer Flores in 2013.[25] In 108 games for the Mets in 2023, Baty batted .212/.275/.323 with 9 home runs and 34 RBI.
On May 3, 2024, Baty hit two home runs in a loss against theTampa Bay Rays, marking the first multi-homer game of his career.[26] He was optioned to Triple-A Syracuse on May 31.[27] In 2024, Baty played in 50 games for the Mets, batting .229/.306/.327 with 4 home runs and 16 RBI.[28]
Baty was named to the Mets'Opening Day roster for the 2025 season.[29]