Greg Weissert Bio
Gregory R. Weissert is an American professional baseball pitcher for the Boston Red Sox of Major League Baseball (MLB). He has previously played in MLB for the New York Yankees, who selected him in the 18th round of the 2016 MLB Draft. Weissert made his MLB debut in 2022 and has built a career as a reliable relief pitcher known for his sharp slider.
Standing 6 feet 2 inches tall and throwing right-handed, Weissert has spent his professional career moving steadily through the minor leagues before establishing himself at the highest level. He wears number 57 for the Boston Red Sox and continues to contribute as a member of the team’s pitching staff.
Early Life and Background
Gregory R. Weissert was born on February 4, 1995, in Bay Shore, New York, USA. He grew up in Bay Shore, a community on the south shore of Long Island, where he developed an early interest in athletics. He attended Bay Shore High School, where he was named an all-county selection in both baseball and volleyball, demonstrating his versatility as a young athlete.
Of Italian heritage through his paternal grandmother, who emigrated to the United States from Calabria, Weissert was not raised in a traditionally Italian American household. After completing high school, he went on to attend Fordham University in the Bronx, where he played college baseball for the Fordham Rams for three seasons. As a junior, he posted a 5–4 win–loss record with a 4.04 earned run average (ERA) and 82 strikeouts over 14 starts, establishing himself as a promising arm for the program.
During the summer of 2015, Weissert played for the Thunder Bay Border Cats of the Northwoods League, gaining valuable experience in a competitive summer collegiate environment. That experience helped him develop the foundation he would carry into professional baseball the following year.
Path to Baseball
Weissert’s path to professional baseball began when the New York Yankees selected him in the 18th round of the 2016 MLB Draft. Although he was not an early-round selection, his performance in college and summer leagues convinced the Yankees to invest in his development. He signed with the organization and was initially assigned to the Pulaski Yankees of the Appalachian League.
After a short stint in Pulaski, Weissert earned a promotion to the Single-A Charleston RiverDogs. He continued to develop his craft in the Yankees’ minor league system, sharpening his slider and refining his command on the mound. His steady progress through the lower levels of the minor leagues laid the groundwork for a long career in professional baseball.
Greg Weissert Career
Early Career (2016–2019)
After signing with the Yankees in 2016, Weissert spent time with the Pulaski Yankees and the Single-A Charleston RiverDogs. He played the 2017 season with the Low-A Staten Island Yankees, continuing to build his resume in the New York-Penn League. Returning to Charleston for the beginning of the 2018 season, he struck out 50 batters while posting a 2.62 ERA over 34 and one-third innings pitched, earning a promotion to the Tampa Tarpons of the High-A Florida State League.
Weissert opened the 2019 season with the Tarpons and was promoted mid-year to the Double-A Trenton Thunder, where he posted a 1.88 ERA over 14 relief appearances. That strong performance earned him a late-season promotion to the Triple-A Scranton/Wilkes-Barre RailRiders for the team’s postseason. His ascent through three levels in a single season signaled that he was nearing big-league readiness.
New York Yankees (2022–2023)
Going into the 2021 season, Baseball America rated Weissert as having the best slider in the Yankees’ minor league system, a notable distinction within a deep organization. After starting the year with the Yankees’ new Double-A affiliate, the Somerset Patriots, he was promoted to Scranton/Wilkes-Barre after posting a 0.71 ERA in 12 and two-thirds innings pitched over 12 appearances. In 2022, Weissert served as Scranton/Wilkes-Barre’s closer, handling high-pressure situations in the late innings.
On August 25, 2022, the Yankees promoted Weissert to the major leagues. In his major-league debut that night, he hit a batter with his first pitch, committed a balk, hit another batter with his second pitch, and allowed two walks before being removed from the game. Five days later, on August 30, he collected his first career win after tossing 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.
Boston Red Sox (2024–Present)
On December 5, 2023, the Yankees traded Weissert, along with Richard Fitts and Nicholas Judice, to the Boston Red Sox in exchange for outfielder Alex Verdugo. The move gave Weissert a fresh opportunity within the American League East division and brought him into a new organizational culture. He joined the Red Sox looking to build on his late-inning experience and continue refining his slider-heavy approach.
Driving Style and Strengths
Weissert is a right-handed relief pitcher whose primary weapon is a sharp slider that was once rated the best in the Yankees’ minor league system by Baseball America. He has shown the ability to miss bats in high-leverage situations and has handled closing duties at the Triple-A level. His track record of strikeouts and low earned run averages in the minor leagues points to a pitcher built for late-inning work at the big-league level.
Notable Events and Milestones
Among the most memorable moments of Weissert’s career was his first major-league win on August 30, 2022, against the Los Angeles Angels, where he delivered two scoreless innings in a 7–4 victory. His call-up to the majors in August 2022 represented a milestone earned through years of steady work in the minor leagues. The December 2023 trade that sent him to the Boston Red Sox also marked a pivotal chapter transition in his career.
Greg Weissert Career Wins
Greg Weissert has collected wins across multiple levels of professional baseball, beginning with his college years at Fordham and continuing through the minor leagues and Major League Baseball. Through his MLB career, he has compiled a 13–9 win–loss record with a 3.33 ERA and 178 strikeouts. His first major-league win came in August 2022 against the Los Angeles Angels.
MLB Highlights
Weissert’s most significant MLB highlight to date is his first career win against the Los Angeles Angels on August 30, 2022, where he delivered two scoreless innings in a 7–4 victory. He has continued to add to his win total since joining the Boston Red Sox, working primarily as a relief pitcher out of the bullpen.
Minor League Highlights
During his time in the Yankees’ minor league system, Weissert posted standout numbers at several levels, including a 2.62 ERA with the Tampa Tarpons in 2018 and a 1.88 ERA across 14 relief appearances with the Double-A Trenton Thunder in 2019. In 2022, he served as the closer for the Triple-A Scranton/Wilkes-Barre RailRiders, demonstrating his ability to handle high-leverage work.
Greg Weissert Family
Family Background and Heritage
Greg Weissert has Italian ancestry through his paternal grandmother, who emigrated to the United States from Calabria. Although he was not raised in a traditionally Italian American household, his heritage later qualified him to represent Italy on the international stage. His former New York Yankees teammate Ron Marinaccio helped facilitate contact with the Italian baseball federation, leading to Weissert’s selection to the Italy national baseball team for the 2026 World Baseball Classic.
Personal Life
In January 2021, Greg Weissert married his wife, Abigail. The couple has been supportive of his career as he has moved between organizations within Major League Baseball. Weissert’s personal life reflects a steady, family-oriented foundation that has complemented his professional journey through the minor and major leagues.
2025 Season Performance
Greg Weissert entered the 2025 season continuing his role as a relief pitcher for the Boston Red Sox, building on the momentum of his transition from the New York Yankees the prior offseason. Working primarily out of the bullpen, he contributed to a Red Sox pitching staff looking to compete in the American League East. His experience in high-leverage situations, developed during his time as a closer in the minor leagues, continued to be an asset for the Boston bullpen.
Throughout the 2025 season, Weissert remained a reliable late-inning option, leaning on the slider that Baseball America once rated the best in the Yankees’ minor league system. His ability to miss bats and limit damage in tight games provided stability for the Red Sox as they navigated a competitive division race. He continued to add to his career totals, with his MLB statistics reflecting a 13–9 win–loss record, a 3.33 ERA, and 178 strikeouts over the course of his big-league career.
Looking ahead, Weissert’s outlook with the Red Sox remains positive as he works to expand his role within the bullpen and contribute to postseason aspirations. His international experience representing Italy in the 2026 World Baseball Classic also points to a pitcher whose career continues to grow on multiple stages. With his slider still serving as his primary weapon, Weissert remains a steady presence in the Boston relief corps.
