Grant Hartwig

Grant Alexander Hartwig (born December 18, 1997) is an American professional baseball pitcher for the New York Mets of Major League Baseball (MLB). He made his MLB debut in 2023.

Amateur career
Hartwig attended Detroit Catholic Central High School in Detroit, Michigan, and played for the school's baseball team. He enrolled at Miami University of Ohio, where he played college baseball for the Miami Redhawks. He underwent Tommy John surgery in April 2018 and missed the rest of the season and the entire 2019 season. The surgery and recovery made Hartwig interested in studying to become an orthopedic surgeon. The 2020 season was abbreviated due to the COVID-19 pandemic.

During the 2021 season, Hartwig's senior year, no scouts approached him prior to the 2021 Major League Baseball draft. He was not selected in the draft's 20 rounds. Hartwig graduated with a bachelor's degree in microbiology and returned to his parents' house and studied for the Medical College Admission Test (MCAT).

Professional career
A few days after the draft, and two weeks before the MCAT, the New York Mets reached out to Hartwig and offered him a contract with a $20,000 signing bonus, the maximum allowed for an undrafted free agent. Hartwig chose to postpone taking the MCAT and signed with the Mets.

Hartwig started his professional career in 2021 with the Florida Complex League Mets and was promoted to the Low-A St. Lucie Mets. Hartwig was assigned to St. Lucie to begin the 2022 season, and was promoted to the High-A Brooklyn Cyclones in May. The Mets promoted him to the Double-A Binghamton Rumble Ponies in July and the Triple-A Syracuse Mets in September. Between the four teams, he recorded a 1.75 earned run average with 83 strikeouts and only one home run allowed in $56 2/3$ innings pitched. After the season, he played for the Peoria Javelinas in the Arizona Fall League.

Hartwig started the 2023 season with Syracuse. In 21 appearances for the team, he registered a 4.21 ERA with 35 strikeouts and 3 saves in $25 2⁄3$ innings of work. The Mets promoted Hartwig to the major leagues for the first time on June 19, 2023, and he made his major league debut the same day, relieving Max Scherzer in the ninth inning of a game against the Houston Astros. Hartwig pitched one inning, giving up no runs on one hit and one walk. He made 28 appearances for the Mets in his rookie campaign, posting a 5–2 record and 4.84 ERA with 30 strikeouts across $35 1⁄3$ innings pitched.

Hartwig was optioned to Triple–A Syracuse to begin the 2024 season. On June 21, 2024, Hartwig underwent surgery to repair a torn meniscus in his left knee and was ruled out for six–to–eight weeks.