Colin Selby Bio
Colin Andrew Selby (born October 24, 1997) is an American professional baseball pitcher for the Baltimore Orioles of Major League Baseball (MLB). A right-handed reliever, Selby has also played in the major leagues for the Pittsburgh Pirates and the Kansas City Royals. He made his MLB debut in 2023 after working his way through the Pirates’ minor league system.
Originally selected in the 2018 MLB Draft out of Randolph–Macon College, Selby has built his career as a relief pitcher, working primarily out of the bullpen at the minor league and major league levels. He has spent time at every level of the Pirates’ farm system and has continued his development within the Orioles organization.
Colin Selby
Early Life and Background
Colin Andrew Selby was born on October 24, 1997, in the United States. Growing up, he developed an interest in baseball and continued to pursue the sport through his school years. His path to professional baseball ran through collegiate competition rather than a high school showcase route.
Selby attended Randolph–Macon College, a small private school in Ashland, Virginia, where he played college baseball. His performances on the mound for the Yellow Jackets drew the attention of Major League scouts, and his development at the Division III level became the foundation for his professional career.
Path to Professional Baseball
Selby’s path to professional baseball began in earnest during the 2018 MLB Draft. The Pittsburgh Pirates selected him in the 16th round with the 474th overall pick, signaling their belief in his arm strength and projectability. He signed with the organization and began his professional career that summer.
After being drafted, Selby started his minor league career in 2018 with the rookie-level Bristol Pirates, where he posted a 4.15 ERA across 11 starts. The following year, he moved up to Single-A Greensboro Grasshoppers and recorded a 6-3 record with a 2.97 ERA and 86 strikeouts in 88 innings, establishing himself as a promising arm in the Pirates’ system.
Colin Selby Career
Early Career (2018-2021)
Selby’s first two professional seasons gave the Pirates’ front office a clear look at his potential. His strong 2019 campaign at Greensboro suggested he could handle a full-season assignment, and the organization kept him on a development track through the lower minors.
The 2020 minor league season was canceled because of the COVID-19 pandemic, keeping Selby off the mound for the year. He returned to High-A Greensboro in 2021, this time working primarily out of the bullpen. In 31 appearances, he logged a 4.37 ERA with 67 strikeouts and 6 saves across 59 2/3 innings, showing he could handle a relief role.
Pittsburgh Pirates (2022-2024)
Selby spent the 2022 season with the Double-A Altoona Curve, also making three appearances for the Triple-A Indianapolis Indians. In 26 games for Altoona, he posted a 2.27 ERA with 43 strikeouts and 8 saves in 32 2/3 innings, and his performance pushed him onto the organization’s major league radar.
On November 15, 2022, the Pirates added Selby to their 40-man roster to protect him from the Rule 5 Draft. He began 2023 with Indianapolis and served as the Indians’ primary closer, recording a 3.86 ERA with 6 saves in 28 appearances before earning his first major league call-up. On August 8, 2023, the Pirates promoted Selby to the majors, and he made his MLB debut the following day against the Atlanta Braves, pitching 1 2/3 innings in relief and striking out three batters.
Selby appeared in 21 games during his rookie season, finishing with a 9.00 ERA and 30 strikeouts across 24 innings pitched. He was optioned to Triple-A Indianapolis to begin 2024, and on April 2, 2024, the Pirates designated him for assignment following the acquisition of Joey Bart.
Kansas City Royals (2024)
On April 7, 2024, the Pittsburgh Pirates traded Selby to the Kansas City Royals in exchange for Connor Oliver. He made two appearances for Kansas City, posting a 6.00 ERA with no strikeouts across three innings pitched. The Royals designated him for assignment on July 6, 2024.
Baltimore Orioles Era (2024-Present)
On July 11, 2024, the Royals traded Selby to the Baltimore Orioles in exchange for cash considerations. He made three scoreless appearances for Baltimore, striking out five batters over four innings pitched, providing a brief but effective introduction to his new club.
The Orioles optioned Selby to the Triple-A Norfolk Tides to begin the 2025 season, where he continued to develop as a relief arm within the organization. His work in the Baltimore system positioned him as a depth option for the major league bullpen.
Notable Events and Milestones
Selby’s most significant career milestone came on August 9, 2023, when he made his major league debut against the Atlanta Braves, striking out three batters in 1 2/3 innings of relief. His addition to the Pirates’ 40-man roster ahead of the 2023 season and his subsequent MLB debut marked the culmination of a five-year climb through Pittsburgh’s minor league ranks.
Colin Selby Career Highlights
Colin Selby’s career has been defined by steady progression through the minor leagues, highlighted by his standout 2022 season at Double-A Altoona, where he posted a 2.27 ERA with 8 saves. His MLB debut in August 2023 was the next major step, followed by brief stints with the Kansas City Royals and the Baltimore Orioles that established him as a Triple-A depth arm with major league experience.
Minor League Highlights
Selby spent parts of six seasons in the minor leagues, working his way from rookie ball to Triple-A. His most productive stretch came in 2022 with Altoona, where his 2.27 ERA and 8 saves earned him a spot on Pittsburgh’s 40-man roster. He also served as the Indianapolis Indians’ primary closer in 2023, recording 6 saves before his promotion.
Other Wins & Performances
Outside of his major league appearances, Selby posted consistently strong numbers in the Pirates’ farm system, including a 2.97 ERA at Single-A Greensboro in 2019. His combination of strikeout ability and late-inning experience made him a reliable bullpen piece across multiple levels.
Colin Selby Family
Personal Life
Colin Selby is an American professional baseball pitcher. Details about his family life are not publicly available.
2025 Season Performance
Selby began the 2025 season with the Triple-A Norfolk Tides, the Baltimore Orioles’ top affiliate. After his brief but effective late-season stint with Baltimore in 2024, the organization kept him in the minors to open the year while he continued to refine his work out of the bullpen.
His role with Norfolk gave him the chance to log regular innings and stay ready as a potential call-up option for the Orioles’ major league bullpen. Selby’s prior major league experience with the Pittsburgh Pirates, Kansas City Royals, and Baltimore Orioles positioned him as a depth arm who could be summoned if needed.
As the 2025 season unfolds, Selby remains a depth piece within the Orioles’ system, with the chance to return to the major leagues depending on team needs. His mix of minor league success and prior MLB appearances gives Baltimore a familiar option should bullpen help be required later in the year.