Geoffrey Thomas Hartlieb (born December 9, 1993) is an American professional

baseball Baseball is a bat-and-ball games, bat-and-ball sport played between two team sport, teams of nine players each, taking turns batting (baseball), batting and Fielding (baseball), fielding. The game occurs over the course of several Pitch ...

pitcher In baseball, the pitcher is the player who throws ("Pitch (baseball), pitches") the Baseball (ball), baseball from the pitcher's mound toward the catcher to begin each play, with the goal of out (baseball), retiring a batter (baseball), batter, ...

for the

Detroit Tigers The Detroit Tigers are an American professional baseball team based in Detroit. The Tigers compete in Major League Baseball (MLB) as a member club of the American League (AL) American League Central, Central Division. One of the AL's eight chart ...

Major League Baseball Major League Baseball (MLB) is a professional baseball league composed of 30 teams, divided equally between the National League (baseball), National League (NL) and the American League (AL), with 29 in the United States and 1 in Canada. MLB i ...

(MLB). He has previously played in MLB for the

Pittsburgh Pirates The Pittsburgh Pirates are an American professional baseball team based in Pittsburgh. The Pirates compete in Major League Baseball (MLB) as a member club of the National League (baseball), National League (NL) National League Central, Central ...

New York Mets The New York Mets are an American professional baseball team based in the Boroughs of New York City, New York City borough of Queens. The Mets compete in Major League Baseball (MLB) as a member club of the National League (baseball), National ...

Miami Marlins The Miami Marlins are an American professional baseball team based in Miami. The Marlins compete in Major League Baseball (MLB) as a member club of the National League (baseball), National League (NL) National League East, East Division. The ...

Colorado Rockies The Colorado Rockies are an American professional baseball team based in Denver. The Rockies compete in Major League Baseball (MLB) as a member club of the National League (baseball), National League (NL) National League West, West Division. Th ...

, and

New York Yankees The New York Yankees are an American professional baseball team based in the Boroughs of New York City, New York City borough of the Bronx. The Yankees compete in Major League Baseball (MLB) as a member club of the American League (AL) Am ...

Amateur career

Hartlieb attended Highland High School in

Highland, Illinois Highland is a city in Madison County, Illinois, United States. The population was 9,991 at the 2020 census. Highland began as a Swiss settlement and derived its name from later German immigrants. Highland is a sister city of Sursee in Switze ...

. Hartlieb was all-state in basketball his junior and senior years of high school, and originally quit baseball at the end high school. He attended

Quincy University Quincy University (QU) is a Private college, private Franciscans, Franciscan college in Quincy, Illinois, United States. Founded in 1860, it has an enrollment of approximately 1,300 undergraduate and graduate students across five constituent sch ...

Quincy, Illinois Quincy ( ) is a city in Adams County, Illinois, United States, and its county seat. Located on the Mississippi River, the population was 39,463 as of the 2020 United States census, 2020 census, down from 40,633 in 2010. The Quincy, Illinois, mic ...

his freshman year of college in 2013 and played

college basketball College basketball is basketball that is played by teams of Student athlete, student-athletes at universities and colleges. In the Higher education in the United States, United States, colleges and universities are governed by collegiate athle ...

for the

Hawks Hawks are bird of prey, birds of prey of the family Accipitridae. They are very widely distributed and are found on all continents, except Antarctica. The subfamily Accipitrinae includes goshawks, sparrowhawks, sharp-shinned hawks, and othe ...

. He then transferred to

Lindenwood University Lindenwood University is a private university in St. Charles, Missouri, United States. Founded in 1832 by George Champlin Sibley and Mary Easton Sibley as The Lindenwood School for Girls, it is the second-oldest higher-education institution wes ...

Saint Charles, Missouri Saint Charles (commonly abbreviated St. Charles) is a city in, and the county seat of, St. Charles County, Missouri, United States. The population was 70,493 at the 2020 census, making St. Charles the ninth-most populous city in Missouri. Situa ...

to play

college baseball College baseball is baseball that is played by Student athlete, student-athletes at institutions of higher education. In the United States, college baseball is sanctioned mainly by the National Collegiate Athletic Association (NCAA); in Japan, ...

from 2014 through 2016. He was drafted by the

in the 37th round of the

2015 MLB draft The 2015 Major League Baseball draft was held from June 8 through June 10, 2015, to assign amateur baseball players to MLB teams. The draft order is the reverse order of the 2014 MLB season standings. As the Diamondbacks finished the 2014 season ...

, but did not sign and returned to Lindenwood.

Professional career

Pittsburgh Pirates

The

selected Hartlieb in the 29th round of the

2016 Major League Baseball draft The 2016 Major League Baseball draft began on June 9, 2016, to assign amateur baseball players to MLB teams. The draft order is the reverse order of the 2015 MLB season standings. In addition, compensation picks were distributed for players who ...

and signed. He signed with the Pirates spent his first professional season with the

Bristol Pirates The Bristol Pirates were a Minor League Baseball team in Bristol, Virginia, United States. They were a Rookie-level team in the Appalachian League. The team played home games at DeVault Memorial Stadium. Opened in 1969, Devault Memorial Stadium ...

in 2016, going 4–1 with a 4.44

earned run average In baseball statistics, earned run average (ERA) is the average of earned runs allowed by a pitcher per nine innings pitched (i.e. the traditional length of a game). It is determined by dividing the number of earned runs allowed by the number ...

(ERA) in 26

innings pitched In baseball, the statistic innings pitched (IP) is the number of innings a pitcher has completed, measured by the number of Batter (baseball), batters and baserunners that have been put out while the pitcher is on the Baseball field#Pitcher's mou ...

. He spent the 2017 season with the

West Virginia Power The Charleston Dirty Birds are an United States, American professional baseball team based in Charleston, West Virginia. They are a member of the South Division of the Atlantic League of Professional Baseball, a MLB Partner League, partner league ...

and the

Bradenton Marauders The Bradenton Marauders are a Minor League Baseball team of the Florida State League and the Single-A affiliate of the Pittsburgh Pirates. They are located in Bradenton, Florida, and play their home games at LECOM Park, which also serves as the ...

, combining to go 2–6 with a 2.12 ERA in innings. In 2018, he played for the

Altoona Curve The Altoona Curve are a Minor League Baseball team based in Altoona, Pennsylvania, named after nearby Horseshoe Curve (but also alluding to the curveball, a type of pitch). The team plays in the Eastern League and is the Double-A affiliate of ...

, going 8–2 with a 3.24 ERA in 58 innings. During the 2018 offseason, he played for the

Surprise Saguaros The Surprise Saguaros are a baseball team that plays in the West Division of the Arizona Fall League. They play their home games in Surprise, Arizona, at Surprise Stadium. The ballpark is also the spring training facility of the Kansas City Roya ...

of the

Arizona Fall League The Arizona Fall League (AFL) is an off-season baseball league owned and operated by Major League Baseball (MLB) which operates during autumn in Arizona, United States, at six different baseball complexes. Arizona Fall League rosters are filled ...

. Hartlieb opened the 2019 season with the Triple-A

Indianapolis Indians The Indianapolis Indians are a Minor League Baseball team of the International League (IL) and the Triple-A (baseball), Triple-A affiliate of the Pittsburgh Pirates. They are located in Indianapolis, Indiana, and play their home games at Victory ...

. The Pirates promoted Hartlieb to the major leagues for the first time on May 17, 2019. He made his major-league debut on May 18 versus the

San Diego Padres The San Diego Padres are an American professional baseball team based in San Diego. The Padres compete in Major League Baseball (MLB) as a member club of the National League (baseball), National League (NL) National League West, West Division. ...

. In 2020 for Pittsburgh, Hartlieb pitched to a 3.63 ERA, allowing only one home run in innings pitched. In 2021, Hartlieb split the between Indianapolis and Pittsburgh, but struggled to a 7.71 ERA in four major-league appearances before he was

designated for assignment Designated for assignment (DFA) is a contractual term used in Major League Baseball (MLB). A player who is designated for assignment is immediately removed from the team's 40-man roster, after which the team must, within seven days, return the pla ...

on July 3, 2021.

New York Mets

On July 9, 2021, Hartlieb was claimed off waivers by the

and was assigned to the Triple-A

Syracuse Mets The Syracuse Mets are a Minor League Baseball team of the International League and the Triple-A (baseball), Triple-A affiliate of the New York Mets. They are located in Syracuse, New York, and play their home games at NBT Bank Stadium, which ope ...

. Hartlieb made seven appearances for the Mets in 2021, struggling to an 11.00 ERA with nine strikeouts. On September 2, Hartlieb was designated for assignment by the Mets.

Boston Red Sox

On September 4, 2021, Hartlieb was claimed off of waivers by the

Boston Red Sox The Boston Red Sox are an American professional baseball team based in Boston. The Red Sox compete in Major League Baseball (MLB) as a member club of the American League (AL) American League East, East Division. Founded in as one of the Ameri ...

, and was optioned to the Triple-A

Worcester Red Sox The Worcester Red Sox (nicknamed the WooSox) are a professional minor league baseball team based in Worcester, Massachusetts. Beginning play in 2021, the team is the Triple-A affiliate of the Boston Red Sox, succeeding the Pawtucket Red Sox. Th ...

. On September 23, Hartlieb was designated for assignment by the Red Sox. He cleared waivers and was sent outright to Worcester on September 26. Hartlieb spent the entirety of the 2022 season with Triple–A Worcester. In 40 appearances, he registered a 3–6 record and 5.16 ERA with 64 strikeouts in 61.0 innings of work. He elected free agency following the season on November 10, 2022.

Miami Marlins

On November 29, 2022, Hartlieb signed a minor league deal with the

. In 26 games for the Triple–A

Jacksonville Jumbo Shrimp The Jacksonville Jumbo Shrimp are a Minor League Baseball team of the International League (IL) and the Triple-A (baseball), Triple-A affiliate of the Miami Marlins. They are located in Jacksonville, Florida, and are named for shrimp caught in th ...

, he posted a 3.18 ERA with 36 strikeouts and 6 saves in 34 innings of work. On August 6, 2023, the Marlins selected Hartlieb's contract, adding him to the major league roster. He made his Miami debut that day, tossing an inning against the Texas Rangers and allowing one run while striking out two. Hartlieb would make only one more appearance for the Marlins before he was

on September 6. He cleared waivers and was sent outright to Triple–A Jacksonville on September 8. On October 5, Hartlieb elected free agency.

Colorado Rockies

On November 13, 2023, Hartlieb signed a minor league contract with the

. In 22 games for the Triple–A

Albuquerque Isotopes The Albuquerque Isotopes are a Minor League Baseball team of the Pacific Coast League and the Triple-A affiliate of the Colorado Rockies. They play home games at Rio Grande Credit Union Field at Isotopes Park in Albuquerque, New Mexico, at an ...

, he logged a 5.61 ERA with 34 strikeouts across inning pitched. On June 8, 2024, the Rockies selected Hartlieb's contract, adding him to their active roster. In five games for Colorado, he struggled to a 9.00 ERA with seven strikeouts across nine innings pitched. Hartlieb was designated for assignment following the promotion of Austin Kitchen on June 22. He cleared waivers and was sent outright to Albuquerque on June 25. Hartlieb elected free agency on October 2.

New York Yankees

On October 18, 2024, Hartlieb signed a minor league contract with the

. In 24 appearances for the Triple-A

Scranton/Wilkes-Barre RailRiders The Scranton/Wilkes-Barre RailRiders, often abbreviated to SWB RailRiders, are a Minor League Baseball team of the International League (IL) and the Triple-A (baseball), Triple-A affiliate of the New York Yankees. They are located in Moosic, Pen ...

, he posted a 3-2 record and 3.34 ERA with 38 strikeouts and two saves across 35 innings of work. On June 30, 2025, the Yankees selected Hartlieb's contract, adding him to their active roster. In his only appearance on July 1, Hartlieb allowed three runs in one inning of work against the

Toronto Blue Jays The Toronto Blue Jays are a Canadian professional baseball team based in Toronto. The Blue Jays compete in Major League Baseball (MLB) as a member club of the American League (AL) American League East, East Division. Since 1989, the team has p ...

. The next day, he was designated for assignment by the Yankees. Hartlieb elected free agency in lieu of an outright assignment on July 4. On July 6, Hartlieb re-signed with New York on a major league contract. He made another sole appearance for the team before being designated for assignment a second time on July 9. Hartlieb elected free agency after clearing waivers on July 11.

Detroit Tigers

On July 12, 2025, Hartlieb signed a minor league contract with the

. He made two scoreless appearances for the Triple-A

Toledo Mud Hens The Toledo Mud Hens are a Minor League Baseball team of the International League and the Triple-A affiliate of the Detroit Tigers. They are located in Toledo, Ohio, and play their home games at Fifth Third Field. A baseball team nicknamed the ...

, recording one win, four strikeouts, and one save across innings pitched. On July 24, the Tigers selected Hartlieb's contract, adding him to their active roster. Hartlieb was designated for assignment after appearing in only two games for the Tigers.

References

External links

* {{DEFAULTSORT:Hartlieb, Geoff 1993 births Living people Águilas Cibaeñas players Albuquerque Isotopes players Altoona Curve players American expatriate baseball players in the Dominican Republic Baseball players from Madison County, Illinois Bradenton Marauders players Bristol Pirates players Colorado Rockies players Detroit Tigers players Indianapolis Indians players Jacksonville Jumbo Shrimp players Lindenwood Lions baseball players Major League Baseball pitchers Miami Marlins players New York Mets players New York Yankees players People from Highland, Illinois Pittsburgh Pirates players Quincy Hawks men's basketball players Scranton/Wilkes-Barre RailRiders players Surprise Saguaros players Syracuse Mets players Toledo Mud Hens players West Virginia Power players Worcester Red Sox players 21st-century American sportsmen