Ryan Joseph Zeferjahn (born February 28, 1998) 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

Los Angeles Angels The Los Angeles Angels are an American professional baseball team based in the Greater Los Angeles, Greater Los Angeles area. The Angels compete in Major League Baseball (MLB) as a member club of the American League (AL) American League West, ...

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).

Amateur career

A native of

Topeka, Kansas Topeka ( ) is the capital city of the U.S. state of Kansas and the county seat of Shawnee County. It is along the Kansas River in the central part of Shawnee County, in northeastern Kansas, in the Central United States. As of the 2020 cen ...

, Zeferjahn played

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, ...

at the

University of Kansas The University of Kansas (KU) is a public research university with its main campus in Lawrence, Kansas, United States. Two branch campuses are in the Kansas City metropolitan area on the Kansas side: the university's medical school and hospital ...

. In 2017, he played

collegiate summer baseball Collegiate summer baseball leagues are amateur baseball leagues in the United States and Canada featuring players who have attended at least one year of college and have at least one year of athletic eligibility remaining. Generally, they operat ...

with the

Falmouth Commodores The Falmouth Commodores are a collegiate summer baseball team based in Falmouth, Massachusetts. The team is a member of the Cape Cod Baseball League (CCBL) and plays in the league's West Division. The Commodores play their home games at Arnie All ...

of the

Cape Cod Baseball League The Cape Cod Baseball League (CCBL or Cape League) is a collegiate summer baseball wooden bat league located on Cape Cod in the U.S. state of Massachusetts. One of the nation's premier collegiate summer leagues, the league boasts over 1,000 forme ...

Professional career

Boston Red Sox

Zeferjahn was drafted 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 ...

in the third round, with the 107th overall selection, of the

2019 Major League Baseball draft The 2019 Major League Baseball draft was held from June 3 to 5, 2019. The draft assigned amateur baseball players to MLB teams. The draft order was set based on the reverse order of the 2018 MLB season standings. In addition, compensation picks ...

. He made his professional debut with the Low–A

Lowell Spinners The Lowell Spinners were a baseball team based in Lowell, Massachusetts. From 1996 to 2020, they were members of Minor League Baseball's New York–Penn League (NYPL) as the Class A Short Season affiliate of the Boston Red Sox. With Major Leagu ...

, logging a 4.50 ERA in 12 starts. Zeferjahn did not play in a game in 2020 due to the cancellation of the minor league season because of the

COVID-19 pandemic The COVID-19 pandemic (also known as the coronavirus pandemic and COVID pandemic), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), began with an disease outbreak, outbreak of COVID-19 in Wuhan, China, in December ...

. Zeferjahn returned to action in 2021 with the rookie–level

Florida Complex League Red Sox The Florida Complex League Red Sox are a professional baseball team competing in the rookie-level Florida Complex League (FCL) of Minor League Baseball. The team is owned and operated by the Boston Red Sox of Major League Baseball (MLB). Prior t ...

and Single–A

Salem Red Sox The Salem Red Sox are a Minor League Baseball affiliate of the Boston Red Sox of Major League Baseball (MLB), based in Salem, Virginia, Salem, an independent city adjacent to Roanoke, Virginia. The team competes at the Single-A level in the Car ...

. In 16 starts between the two affiliates, he compiled a 1–4 record and 5.98 ERA with 59 strikeouts across innings pitched. Zeferjahn split the 2022 campaign between the High–A

Greenville Drive The Greenville Drive are a Minor League Baseball team based in Greenville, South Carolina. They are the High-A affiliate of the Boston Red Sox and are a member of the South Atlantic League. They play their home games at Fluor Field at the West E ...

and Double–A

Portland Sea Dogs The Portland Sea Dogs are a Minor League Baseball team based in Portland, Maine, playing in the Eastern League (1938–present), Eastern League. Established in 1994, the Sea Dogs are the Double-A (baseball), Double-A affiliate of the Boston Red ...

. In 34 appearances pitching mainly in relief, he accumulated a 5–4 record and 5.05 ERA with 80 strikeouts over innings pitched. Zeferjahn spent 2023 with Portland, also making two scoreless outings for Salem. In 34 appearances out of the

bullpen In baseball, the bullpen (or simply the pen) is the area where relief pitchers warm up before entering a game. A team's roster of relief pitchers is also metonymically referred to as "the bullpen". These pitchers usually wait in the bullpen if ...

for Portland, he recorded a 5.02 ERA with 68 strikeouts across 43 innings of work. Zeferjahn began the 2024 season with Portland, and was promoted 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 ...

after seven scoreless appearances. In 18 games for Worcester, he registered a 5.47 ERA with 31 strikeouts and 4 saves over innings.

Los Angeles Angels

On July 30, 2024, Zeferjahn, Matthew Lugo, Yeferson Vargas, and Niko Kavadas were traded to the

in exchange for Luis García. In 5 games for the Triple–A

Salt Lake Bees The Salt Lake Bees are a Minor League Baseball (MiLB) team that plays in the Pacific Coast League (PCL) and are the Triple-A affiliate of the Los Angeles Angels. Based in South Jordan, Utah, the team plays its home games at The Ballpark at Am ...

, he posted a 2.35 ERA with 8 strikeouts. On August 23, Zeferjahn was selected to the

40-man roster A Major League Baseball roster is a list of players who are allowed, by league agreement, to play for a Major League Baseball (MLB) team. Each MLB team maintains two rosters: an active roster of players eligible to participate in an MLB game, an ...

and promoted to the major leagues for the first time. In 12 appearances for Los Angeles during his rookie campaign, Zeferjahn recorded a 2.12 ERA with 18 strikeouts over 17 innings of work. On April 6, 2025, Zeferjahn recorded his first career win after tossing a scoreless sixth inning against the

Cleveland Guardians The Cleveland Guardians are an American professional baseball team based in Cleveland. The Guardians compete in Major League Baseball (MLB) as a member club of the American League (AL) Central Division. Since , the team has played its home gam ...

References

External links

Kansas Jayhawks bio
{{DEFAULTSORT:Zeferjahn, Ryan 1998 births Living people Baseball players from Topeka, Kansas Falmouth Commodores players Florida Complex League Red Sox players Greenville Drive players Kansas Jayhawks baseball players Los Angeles Angels players Lowell Spinners players Major League Baseball pitchers Portland Sea Dogs players Salem Red Sox players Salt Lake Bees players Scottsdale Scorpions players Worcester Red Sox players