Greg Weissert Bio
Gregory R. Weissert (born February 4, 1995) is an American professional baseball pitcher for the Boston Red Sox of Major League Baseball (MLB). The New York Yankees selected him in the 18th round of the 2016 MLB Draft, and he made his MLB debut with the Yankees in 2022 before being traded to the Red Sox in December 2023. A right-handed reliever, Weissert has built his career on a strong slider and an ability to generate swings and misses in high-leverage situations out of the bullpen.
Weissert has steadily climbed through the minor leagues, working his way from short-season affiliates in the Yankees system to a closing role at the Triple-A level. His path from a Long Island high school standout to a major-league reliever reflects years of consistent development and a durable work ethic on the mound.
Early Life and Background
Gregory R. Weissert was born on February 4, 1995, in Bay Shore, New York, on Long Island. He grew up in the same community where he would eventually attend high school, and the area helped shape his early connection to baseball. Weissert came from a region with a strong baseball tradition, and he began playing the sport at a young age.
Weissert attended Bay Shore High School, where he was a multi-sport athlete. He earned all-county honors in both baseball and volleyball, demonstrating his athleticism and competitive drive across two different sports. His performance on the baseball diamond drew attention from college programs, and he eventually committed to Fordham University in the Bronx.
At Fordham, Weissert played three seasons of college baseball for the Fordham Rams. During his junior year, he posted a 5–4 win–loss record with a 4.04 earned run average and recorded 82 strikeouts over 14 starts, numbers that helped him earn selection in the 2016 MLB Draft.
Path to Baseball
Following the 2016 draft, Weissert signed with the Yankees and was assigned to the Pulaski Yankees of the Appalachian League. He later earned a promotion to the Single-A Charleston RiverDogs, where he continued refining his pitching arsenal. In 2017, Weissert spent the season with the Low-A Staten Island Yankees, gaining valuable innings at one of the lower levels of full-season ball.
He returned to Charleston at the start of the 2018 campaign before earning a midseason promotion to the Tampa Tarpons of the High-A Florida State League. During his time at Charleston that year, Weissert struck out 50 batters and posted a 2.62 ERA over 34 and one-third innings, numbers that convinced the Yankees he was ready for a stiffer test. The promotion to Tampa marked his first taste of advanced High-A competition.
Greg Weissert Career
Early Career (2016–2018)
Weissert began his professional career in 2016 with the Pulaski Yankees after being drafted in the 18th round. He moved through the lower levels of the Yankees system during his first two seasons, including a 2017 campaign with the Staten Island Yankees that helped him adjust to the routine of a full professional season.
His 2018 season served as a breakthrough at the Low-A level, where his strong strikeout numbers and low ERA led to a promotion to the Tampa Tarpons. The experience against more advanced hitters prepared him for a quick ascent through the upper minors in the years that followed.
New York Yankees Breakthrough (2019–2022)
Weissert opened the 2019 season with the Tampa Tarpons and earned a promotion to the Double-A Trenton Thunder, where he posted a 1.88 ERA over 14 relief appearances. He later joined the Triple-A Scranton/Wilkes-Barre RailRiders for their postseason run. His performance across multiple levels drew the attention of evaluators, and Baseball America rated him as having the best slider in the Yankees’ minor league system entering the 2021 season.
Weissert began 2021 with Somerset, the Yankees’ new Double-A affiliate, and was promoted to Scranton/Wilkes-Barre after posting a 0.71 ERA over 12 and two-thirds innings in 12 appearances. In 2022, he served as Scranton/Wilkes-Barre’s closer, establishing himself as a late-inning option. On August 25, 2022, the Yankees promoted him to the major leagues, and he made his debut that night. He earned his first career win on August 30, 2022, by throwing two scoreless innings in a 7–4 victory over the Los Angeles Angels.
The Yankees optioned Weissert back to Scranton/Wilkes-Barre to begin the 2023 season, where he continued to refine his role as a reliever. His time in pinstripes ended that offseason when the organization opted to reshape its major-league roster.
Boston Red Sox Era (2024–Present)
On December 5, 2023, the Yankees traded Weissert, Richard Fitts, and Nicholas Judice to the Boston Red Sox in exchange for Alex Verdugo. The move gave Weissert a fresh opportunity in the American League East and a chance to compete for a bullpen role in Boston. He joined a Red Sox organization looking to add pitching depth, and his track record as a strikeout-oriented reliever fit the team’s plans for the back end of games.
Since joining Boston, Weissert has continued to focus on his slider-heavy approach and his ability to handle high-pressure innings. He remains an active member of the Red Sox bullpen as the 2025 season unfolds.
Driving Style and Strengths
Weissert is widely regarded for the quality of his slider, which Baseball America once ranked as the best in the Yankees’ minor league system. His pitching style is built around generating swings and misses, and he has shown the ability to miss bats at every level of professional baseball. As a reliever, he has embraced late-inning work, including closing duties at Triple-A, and his competitive makeup has allowed him to thrive in high-leverage spots.
Notable Events and Milestones
One of the defining moments of Weissert’s career came on August 25, 2022, when he made his major-league debut with the Yankees in a memorable outing. Just five days later, on August 30, 2022, he collected his first major-league win against the Los Angeles Angels. His December 2023 trade to the Red Sox marked another major milestone, as it placed him in a new organization with a clear opportunity to contribute at the highest level.
Greg Weissert Career Wins
Gregory R. Weissert has accumulated professional wins across multiple minor-league levels and in the major leagues, with most of his success coming in relief roles. His first MLB win came with the Yankees in 2022, and he has continued to add to his ledger since joining the Red Sox.
Major League Highlights
Weissert’s first career major-league victory came on August 30, 2022, when he pitched two scoreless innings in a 7–4 win over the Los Angeles Angels. He has since contributed to additional victories out of the bullpen for the Red Sox as a late-inning reliever.
Minor League and Other Performances
During his time in the Yankees system, Weissert posted strong numbers at multiple levels, including a 1.88 ERA at Double-A Trenton in 2019 and a 0.71 ERA in 12 appearances at Somerset in 2021. He served as Scranton/Wilkes-Barre’s closer in 2022, accumulating additional wins in high-leverage situations at the Triple-A level.
Greg Weissert Family
Family Background and Racing Lineage
Public details about Gregory R. Weissert’s immediate family and parents are limited. He grew up in Bay Shore, New York, and has credited his Long Island roots and his high school and college communities with shaping his development as a player.
Personal Life
Gregory R. Weissert married his wife, Abigail, in January 2021. The couple has been part of his support system as he has moved through the minor leagues and into a major-league career with the Yankees and Red Sox.
2025 Season Performance
Gregory R. Weissert enters the 2025 season as a member of the Boston Red Sox bullpen, looking to build on his role following the December 2023 trade from the Yankees. With a year of experience in the Boston organization behind him, he is positioned to take on meaningful innings out of the bullpen during the new campaign.
Throughout 2025, Weissert is expected to lean on his slider and his strikeout ability, the same tools that earned him a top minor-league ranking from Baseball America. His performance in high-leverage spots will be a key storyline as the Red Sox evaluate their relief options over the course of the season.
Heading into the stretch run, Weissert’s role and consistency will help shape the Red Sox bullpen picture, and his continued development could make him a steady late-inning presence for the club.