Griffin Conine Bio
Griffin Riley Conine is an American professional baseball outfielder for the Miami Marlins of Major League Baseball (MLB). Born on July 11, 1997, he wears jersey number 18 for the Marlins and patrols the outfield as a left-handed thrower with a right-handed bat. He is the son of former MLB outfielder Jeff Conine, a longtime member of the Marlins organization, which makes Griffin’s journey to the majors a notable family story in modern baseball.
Conine attended Pine Crest High School in Fort Lauderdale, Florida, before playing three seasons of college baseball at Duke University. After being selected in the 2018 MLB draft, he worked his way through the Toronto Blue Jays minor league system before being traded to the Marlins. He made his major league debut in 2024, fulfilling a path that began in South Florida youth baseball circles and culminated in a 40-man roster promotion that August.
Early Life and Background
Griffin Riley Conine grew up around professional baseball because of his father, Jeff Conine, who spent many seasons as an MLB outfielder and is closely identified with the early years of the Marlins franchise. That family connection gave Griffin a familiar view of the routines and demands of a big league career from a young age. He attended Pine Crest High School in Fort Lauderdale, where he played varsity baseball and developed into a professional prospect.
In his senior season at Pine Crest, Conine posted a .341 batting average with eight home runs and 27 runs batted in. That performance drew the attention of MLB scouts, and he was selected in the 31st round of the 2015 MLB draft by the Miami Marlins. Rather than sign with the organization that employed his father, Conine chose to continue his development in college, a decision that allowed him to grow physically and refine his approach at the plate.
Path to Baseball
Conine enrolled at Duke University and spent three seasons with the Blue Devils baseball program. As a freshman, he appeared in 35 games and hit .205 with six runs batted in, adjusting to the speed and craft of college pitching. He took a major step forward as a sophomore, batting .298 with 13 home runs and 56 runs batted in. That season made him the first Duke player to record 50 or more RBI in a season since Nate Freiman in 2009, and the first Blue Devil to hit 10 or more home runs in a season since Jake Lemmerman in 2010.
In his third and final season with Duke, Conine played 63 games and hit .286 with 18 home runs and 52 runs batted in. During the summer of 2017, he played collegiate summer baseball with the Cotuit Kettleers of the Cape Cod Baseball League. He was named a league all-star and the circuit’s Outstanding Pro Prospect, a strong validation of his offensive profile and outfield tools. Those performances set the stage for his selection in the 2018 MLB draft.
Griffin Conine Career
Early Career (2018–2019)
Conine was drafted by the Toronto Blue Jays in the second round, with the 52nd overall pick, of the 2018 MLB draft. He signed on June 20, 2018, for a $1.35 million bonus and was sent to the Rookie-level Gulf Coast Blue Jays. After two games there, he was promoted to the Low-A Vancouver Canadians, and he closed his first professional season with a .243 batting average, seven home runs, and 33 runs batted in across 57 games.
In November 2018, Conine was suspended for 50 games after testing positive for a banned stimulant. He returned for the 2019 season with the Single-A Lansing Lugnuts and put together a strong power-hitting year, slashing .283/.371/.576 with 22 home runs and 64 runs batted in over 80 games. That performance positioned him as a power-hitting corner outfield prospect within the Blue Jays system.
Toronto Blue Jays System and Trade to Miami (2018–2020)
Conine’s first two professional seasons were spent entirely in the Blue Jays organization. He split time between short-season Vancouver and full-season Lansing, showing the kind of on-base skills and home run pop that teams look for in an everyday outfielder. He had not yet reached High-A when the Blue Jays opted to move him as part of a larger roster reshuffle.
On August 31, 2020, the Blue Jays traded Conine to the Miami Marlins as the player to be named later in their deal for Jonathan Villar. The trade sent him back to the organization that had drafted him out of high school six years earlier. He did not appear in a game during the 2020 season because the minor league season was canceled due to the COVID-19 pandemic, leaving him to wait another year before his Marlins minor league career could officially begin.
Miami Marlins (2021–2023)
Conine returned to action in 2021 and split the year between the High-A Beloit Snappers and the Double-A Pensacola Blue Wahoos. Across 108 games, he slashed .218/.330/.531 and set career highs with 36 home runs and 84 runs batted in, confirming the raw power that scouts had long praised. The following year, he returned to Pensacola and played 118 games, hitting .215/.337/.435 with 24 home runs and 74 runs batted in.
In 2023, Conine split the season between Pensacola and the Triple-A Jacksonville Jumbo Shrimp, batting .247/.355/.462 with 20 home runs and 72 runs batted in. The steady production in the upper minors kept him in the conversation as a future big league option and set up his promotion the next summer.
Marlins Major League Debut and Rookie Season (2024)
Conine opened the 2024 season back at Triple-A Jacksonville, where he played 112 games and slashed .268/.350/.475 with 19 home runs and 68 runs batted in. On August 26, 2024, the Marlins selected his contract to the 40-man roster and promoted him to the major leagues for the first time, completing the path he had started with the organization in 2015.
During his rookie major league campaign, Conine appeared in 30 games for the Marlins and batted .268/.326/.451 with three home runs and 12 runs batted in. He split his playing time between left field and right field and gave the Marlins a right-handed power bat off the bench and in platoon situations. The debut campaign established him as a young depth outfielder in the Miami outfield mix.
Notable Events and Milestones
Conine’s selection to the 40-man roster on August 26, 2024, marked the moment he officially became a major leaguer, a milestone shared with his father Jeff, who had spent many years in the same organization. His first MLB hit, first home run, and first multi-hit game each arrived during that 30-game debut stretch, and he finished the year as one of a small group of Conines to have played in the majors. On the farm, his 36-home run, 84-RBI performance in 2021 stood as a personal best, and his Cape Cod League Outstanding Pro Prospect award in 2017 was a clear early sign of his pro trajectory.
Griffin Conine Career Wins
Across his amateur and professional career, Griffin Riley Conine has built his resume on consistent run production rather than championship hardware, as the minor leagues do not award a single season title in the way major league postseasons do. His most decorated individual seasons have come in summer ball and at the upper levels of the minors, where he was a Cape Cod League all-star and Outstanding Pro Prospect in 2017, and a 20-plus home run hitter in multiple minor league seasons.
Minor League and Summer League Highlights
Conine owns the Duke Blue Devils single-season RBI and home run milestones he set as a sophomore and junior, including 56 runs batted in as a sophomore and 18 home runs as a junior. With the Cotuit Kettleers in 2017, he earned Cape Cod League all-star honors and the league’s Outstanding Pro Prospect award, which is one of the summer circuit’s top individual honors. In the minor leagues, he has been a 20-plus home run hitter in 2019, 2021, 2022, and 2023, and reached 30-plus home runs in his breakout 2021 season between Beloit and Pensacola.
Griffin Conine Family
Family Background and Baseball Lineage
Griffin Riley Conine is the son of Jeff Conine, a former MLB outfielder who played 17 seasons in the majors and is a member of the Marlins’ retired numbers conversation for his long service to the franchise. Jeff Conine was a two-time All-Star and a member of the 1997 World Series champion Marlins, giving Griffin a direct link to one of the most successful stretches in Miami baseball history. Growing up in a household shaped by professional baseball helped shape Griffin’s approach to the game and his decision to pursue a career in the sport.
Personal Life
Griffin Conine has kept much of his personal life out of public view, and detailed information about a spouse or children has not been confirmed in available sources. He has been active on social media, including an Instagram account under the handle griffin_co9, where he shares glimpses of his training and family life. Beyond his family ties to Jeff Conine, little else about his private life has been publicly verified.
2025 Season Performance
Griffin Conine’s 2025 season was disrupted almost immediately by a significant injury. On April 19, 2025, the Marlins announced that he had dislocated his left shoulder, and he was transferred to the 60-day injured list the following day. He underwent season-ending surgery on his left shoulder on April 29, putting a halt to what had been an encouraging start to his second major league year.
Before the injury, Conine had been one of the Marlins’ most productive hitters in limited action, batting .352/.352/.438 with one home run and seven runs batted in over 20 appearances. The Marlins later activated him from the injured list on September 22, allowing him to return to the active roster late in the year and finish the season on the field.
Looking ahead from the 2025 campaign, Conine was working to stay healthy and build on a small-sample major league track record that already showed a strong batting average and the ability to drive in runs. With the Marlins still investing in his development as a corner outfielder, his 2025 injury-shortened year set up an important opportunity to re-establish himself in the big league outfield mix.