Stephen Kolek Bio
Stephen James Kolek is an American professional baseball pitcher for the Kansas City Royals of Major League Baseball (MLB). Born on April 18, 1997, he previously played in MLB for the San Diego Padres. Kolek attended Shepherd High School in Shepherd, Texas, before playing college baseball for the Texas A&M Aggies from 2016 to 2018. Drafted by the Los Angeles Dodgers in 2018, he began his professional career with the Ogden Raptors and has since played for multiple teams, establishing himself as a notable pitcher in the league.
Early Life and Background
Stephen James Kolek grew up in Shepherd, Texas, a small community east of Houston. He attended Shepherd High School, where he developed as a pitcher and drew the attention of college recruiters. Coming from a baseball family, Kolek was introduced to the sport at a young age and quickly progressed through local and regional competition.
After high school, Kolek enrolled at Texas A&M University, joining one of the most respected college baseball programs in the country. He spent three seasons with the Texas A&M Aggies, competing in the Southeastern Conference and facing top-level college hitters on a regular basis. His development in College Station helped him refine his craft and prepared him for the jump to professional baseball.
Path to Baseball
Kolek’s college performance with the Aggies positioned him as a legitimate professional prospect ahead of the 2018 draft. Scouts noted his durability, his ability to eat innings, and his composure on the mound. Following his junior season, he declared for the MLB Draft and was selected by the Los Angeles Dodgers in the 11th round, with the 344th overall pick.
That selection launched his minor-league journey, beginning with the rookie-level Ogden Raptors and the Single-A Great Lakes Loons. Across his first professional season, Kolek posted a 1.42 ERA with 30 strikeouts in 17 appearances, signaling the early promise that would eventually carry him to the major leagues.
Stephen Kolek Career
Early Career (2018–2020)
Kolek opened his professional career in the Dodgers’ farm system in 2018, splitting time between Ogden and Great Lakes. He returned to Great Lakes in 2019 and logged a full season as a starter, going 7–8 with a 5.00 ERA and 109 strikeouts across 27 games, including 25 starts. That workload proved valuable in his development as a starting pitcher.
The 2020 minor-league season was canceled because of the COVID-19 pandemic, keeping Kolek off the mound for the entire year. The pause delayed his timeline, but he continued to build his strength and prepare for his next opportunity within professional baseball.
Seattle Mariners Organization (2021–2023)
On April 28, 2021, the Los Angeles Dodgers traded Kolek to the Seattle Mariners in exchange for cash considerations. He split that year across the Single-A Modesto Nuts, the High-A Everett AquaSox, and the Double-A Arkansas Travelers, working to adjust to a new organization. In 24 combined appearances, he logged a 6.03 ERA with 67 strikeouts across 59 and two-thirds innings.
In 2022, Kolek settled in as a starter for Arkansas and turned in a full season, going 6–13 with a 4.51 ERA and 138 strikeouts across 143 and two-thirds innings. By 2023, he had earned a promotion to the Triple-A Tacoma Rainiers, where he recorded a 4.23 ERA with 65 strikeouts and 4 saves across 61 and two-thirds innings in 44 appearances.
San Diego Padres Era (2024–2025)
On December 6, 2023, the San Diego Padres selected Kolek from the Mariners in the Rule 5 draft, securing his contract and giving him a path to the major leagues. On March 19, 2024, the Padres announced that Kolek had made their Opening Day roster. He appeared in 42 games out of the bullpen, compiling a 5.21 ERA with 39 strikeouts across 46 and two-thirds innings before a right forearm tendinitis issue placed him on the injured list on July 31. He was later transferred to the 60-day injured list on September 1, ending his 2024 season.
Kolek was optioned to the Triple-A El Paso Chihuahuas to begin 2025, but he was recalled to the Padres in early May. On May 4, he tossed five and one-third scoreless innings in his season debut, allowing four hits and striking out four to earn the win. His second career start on May 10 was a complete-game shutout in which he tied a Modern Era record for the largest margin in an individual shutout, as San Diego scored 21 runs against the Colorado Rockies. In 14 starts for the Padres, he posted a 4–5 record with a 4.18 ERA and 56 strikeouts across 79 and two-thirds innings.
Kansas City Royals Era (2025–Present)
On July 31, 2025, the San Diego Padres traded Kolek and Ryan Bergert to the Kansas City Royals in exchange for catcher Freddy Fermín. The deal gave Kolek a fresh start and a new opportunity to contribute as a starter in the American League. Through his early tenure with the Royals, he has continued to handle starting responsibilities and provide length out of the rotation.
Notable Events and Milestones
Kolek’s complete-game shutout on May 10, 2025, stands as the defining performance of his major-league career. In that game, he tied the Modern Era record for the largest margin in an individual shutout while his Padres teammates scored 21 runs against the Colorado Rockies. He also reached an early-career milestone by making the Padres’ Opening Day roster in 2024, confirming his place in the big leagues.
Stephen Kolek Career Wins
Stephen Kolek has built his win totals gradually, starting with his minor-league success in the Dodgers system and continuing through stints with the Mariners and Padres organizations. His first major-league victory came with San Diego, and his standout performance in the complete-game shutout against Colorado remains his most memorable.
Major League Highlights
Kolek has recorded multiple wins at the major-league level, including his scoreless debut start on May 4, 2025, and his historic complete-game shutout six days later against the Rockies. Working primarily as a starter for the Padres and Royals, he has provided quality innings and given his teams a chance to win on a regular basis.
Stephen Kolek Family
Family Background and Racing Lineage
Stephen Kolek comes from a family with deep ties to professional baseball. His brother is Tyler Kolek, a former professional baseball player who was selected second overall by the Miami Marlins in the 2014 MLB Draft. Growing up in that environment helped shape Stephen’s approach to the game and gave him an early model of what a professional career could look like.
Personal Life
Stephen James Kolek was raised in Shepherd, Texas, and continues to be identified with his Texas roots. His brother Tyler Kolek remains a notable figure in the family’s baseball story, and the brothers share a long-standing connection to the sport.
2025 Season Performance
Kolek opened 2025 in Triple-A with the El Paso Chihuahuas before a May recall to the San Diego Padres reshaped his season. In his first start back on May 4, he delivered five and one-third scoreless innings to earn the win, and he followed that with a complete-game shutout against the Colorado Rockies on May 10 that tied a Modern Era record. Across 14 starts with the Padres, he went 4–5 with a 4.18 ERA and 56 strikeouts across 79 and two-thirds innings.
On July 31, 2025, Kolek was traded to the Kansas City Royals along with Ryan Bergert in a deal that sent catcher Freddy Fermín to San Diego. The trade gave him a new home in the American League and a chance to cement a rotation role down the stretch. His track record of durability and his recent run of strong starts positioned him as a contributor for Kansas City.
Looking ahead, Kolek’s outlook with the Royals depends on his ability to maintain the gains he showed with the Padres in May and June. With his starting experience, his strike-throwing approach, and his history of handling workloads, he has the tools to remain a reliable option in the Kansas City rotation.
