Ron Marinaccio Bio
Ronald James Marinaccio is an American professional baseball pitcher for the San Diego Padres of Major League Baseball (MLB). He previously played in MLB for the New York Yankees and made his major league debut in 2022. A New Jersey native, Marinaccio has built his career as a relief pitcher after being drafted by the Yankees in 2017. He is married to Gianna Fiore, and the couple resides in the New Jersey area.
Early Life and Background
Ronald James Marinaccio was born on July 1, 1995, in Toms River, New Jersey, USA. He grew up in Toms River, a community on the Jersey Shore with a strong youth sports tradition. He attended Toms River High School North, where he played baseball for the school’s team and graduated in 2013. His time on the high school diamond provided the foundation for his future in the sport.
After high school, Marinaccio enrolled at the University of Delaware, where he played college baseball for the Delaware Fightin’ Blue Hens. He missed what would have been his freshman season in 2014 after undergoing reconstructive elbow surgery and took a redshirt that year. Following his recovery, he returned to the mound and became a starting pitcher, logging starts in 24 of his first 25 college appearances.
Path to Baseball
Marinaccio’s transition to a relief role came during his junior year in 2017, a move that ultimately shaped his professional profile. That summer, the New York Yankees selected him in the 19th round, with the 572nd overall pick, of the 2017 Major League Baseball draft. The decision to work out of the bullpen in college paid off when a major league organization committed to his long-term development.
He made his professional debut with the rookie-level Gulf Coast League Yankees, where he posted a 2.30 ERA across 13 appearances. Over the next two seasons, he moved steadily through the Yankees’ minor league affiliates, sharpening his skills and adding velocity. His college experience as a starter, combined with his new relief role, gave him a versatile foundation heading into the upper levels of the minor leagues.
Ron Marinaccio Career
Early Career (2017–2019)
Marinaccio opened his professional career in the rookie-level Gulf Coast League in 2017, where he posted a 2.30 ERA in 13 games. In 2018, he split the season between the rookie-level Pulaski Yankees and the Low-A Staten Island Yankees, compiling a combined 4.76 ERA with 54 strikeouts and 4 saves across 17 relief appearances. The following year, he advanced to the Single-A Charleston RiverDogs and recorded a 4.18 ERA with 40 strikeouts and 4 saves over 18 outings.
He did not appear in a game in 2020 after the minor league season was canceled because of the COVID-19 pandemic. During that pause, he trained with pitching coach Daniel Moskos, and his fastball velocity climbed from the 90–91 mph range to 94–95 mph. That mechanical work became a turning point in his development as he prepared for the 2021 season.
Yankees Breakthrough (2021–2022)
In 2021, Marinaccio pitched for the Double-A Somerset Patriots, where Moskos served as the pitching coach. On August 8, 2021, he was part of a combined no-hitter started by Luis Severino and also featuring Shawn Semple. The next day, the Yankees promoted him to the Triple-A Scranton/Wilkes-Barre RailRiders, where he finished the year with a 1.82 ERA and 64 strikeouts in 39.2 innings at Somerset, plus a 2.36 ERA in 18 games at Triple-A.
After the 2021 season, the Yankees added Marinaccio to their 40-man roster and placed him on the 2022 Opening Day roster. He made his major league debut on April 9, 2022, and went on to post a 2.05 ERA across 40 relief appearances for New York. His strong debut season established him as a reliable late-inning option in the Yankees’ bullpen.
Yankees Tenure (2023–2024)
In 2023, Marinaccio appeared in 45 games for the Yankees, registering a 3.99 ERA. The club optioned him to Scranton/Wilkes-Barre during the season, where he allowed 15 earned runs in 15.1 innings while walking 18 batters for the RailRiders. He returned to the major league club and continued to log relief innings for New York.
Marinaccio began the 2024 season at Triple-A after being optioned by the Yankees. He made 16 appearances for New York that year, posting a 3.86 ERA with 25 strikeouts over 23.1 innings. On September 20, 2024, the Yankees designated him for assignment, ending his time in the organization that had drafted and developed him.
Padres Era (2025–Present)
On September 23, 2024, the Chicago White Sox claimed Marinaccio off waivers. The White Sox designated him for assignment on January 21, 2025. Three days later, on January 24, 2025, Chicago traded him to the San Diego Padres in exchange for cash considerations. The Padres optioned him to the Triple-A El Paso Chihuahuas to open the 2025 season.
Marinaccio was recalled by the Padres and appeared in 7 games, posting a 0.84 ERA and striking out 12 batters. His early work in San Diego showcased the velocity gains he developed with Moskos and reflected his renewed role as a high-leverage reliever.
Driving Style and Strengths
Marinaccio works primarily as a relief pitcher, relying on a fastball that sits in the 94–95 mph range after his velocity jump during the 2020 shutdown. His partnership with pitching coach Daniel Moskos shaped his mechanics and helped him refine his slider as a secondary weapon. The combination of swing-and-miss stuff and a short burst workload has made him a useful middle-to-late-inning arm.
Notable Events and Milestones
A signature early moment came on August 8, 2021, when Marinaccio took part in the combined no-hitter at Somerset alongside Luis Severino and Shawn Semple. He reached the majors with a strong 2022 debut, and his 0.84 ERA across his first 7 appearances with the Padres in 2025 marked his latest successful transition. Being claimed off waivers by Chicago and quickly traded to San Diego also underscored the demand for his arm across the league.
Ron Marinaccio Career Wins
Marinaccio has built his résumé primarily as a relief pitcher, with consistent strikeout totals across the minor leagues and majors. He has recorded 4 saves in each of his 2018 and 2019 minor league seasons and has posted ERAs under 2.00 in several short major league stints. While he has not been a full-time closer, his ratios and strikeout rates have marked him as a dependable bullpen option.
Major League Highlights
Across his major league career with the Yankees and Padres, Marinaccio has logged more than 100 relief appearances. He opened his MLB career with a 2.05 ERA in 40 games in 2022, his first and most efficient major league season. In 2025, he debuted for the Padres with a 0.84 ERA over 7 appearances, striking out 12 batters in that stretch.
Other Wins & Performances
In the minors, Marinaccio reached as high as Triple-A with Scranton/Wilkes-Barre in 2021, where he posted a 2.36 ERA across 18 relief outings. He was also part of the combined no-hitter with Somerset that same season. Earlier, he helped Charleston RiverDogs and Staten Island Yankees affiliates with steady relief work and a combined 8 saves across 2018 and 2019.
Ron Marinaccio Family
Family Background and Racing Lineage
Marinaccio grew up in Toms River, New Jersey, and has built his career in the northeast baseball pipeline. He attended Toms River High School North before continuing his playing career at the University of Delaware. His development has been shaped more by his coaching relationships, particularly with Daniel Moskos, than by a family baseball lineage.
Personal Life
Marinaccio married Gianna Fiore in Fredon Township, New Jersey, on December 2, 2023. The couple’s wedding was held in the same region where he grew up and where he continues to spend his offseason. He is known to keep a low personal profile outside of his pitching career.
2025 Season Performance
Marinaccio began the 2025 season at Triple-A El Paso after being acquired by the Padres in January. He was recalled to the major league club and appeared in 7 games, posting a 0.84 ERA and recording 12 strikeouts. That early output suggested a strong fit in the Padres’ relief picture.
His velocity gains and refined slider, both developed with Moskos, have carried over to his new organization. Marinaccio entered the season looking to lock down a consistent middle-relief role and possibly push into higher-leverage innings. With several relievers in front of him on the depth chart, his performance through the year will determine how often the Padres lean on him in late situations.
Heading into the rest of 2025, Marinaccio’s outlook depends on maintaining his strike-throwing and limiting walks, areas that challenged him during his Triple-A stints in prior years. If he sustains his early Padres form, he could play a meaningful role in the bullpen during the playoff push. The season marks a fresh chapter for a pitcher who has already navigated promotions, a velocity jump, and two uniform changes in the span of three years.