John Edward King Bio
John Edward King is an American professional baseball pitcher who has played in Major League Baseball for the Texas Rangers, St. Louis Cardinals, and most recently the Miami Marlins. Born on September 14, 1994, in Sugar Land, Texas, King has built a reputation as a versatile reliever capable of delivering quality innings out of the bullpen. Since making his MLB debut in 2020, he has navigated the challenges of professional baseball, including injuries and roster moves, while establishing himself as a dependable arm at the major league level.
Early Life and Background
King grew up in Sugar Land, Texas, and attended William P. Clements High School, where he developed his skills as a baseball player. His talent on the mound earned him recognition during his high school career, setting the foundation for his pursuit of professional baseball.
After graduating from high school, King continued his baseball journey at Angelina College in Lufkin, Texas, where he played for the Roadrunners during the 2014 and 2015 seasons. He then transferred to the University of Houston, joining the Cougars baseball program for the 2016 and 2017 seasons. During his senior season at Houston, King faced a significant setback when he tore the ulnar collateral ligament in his left elbow. Despite the injury, he continued to pitch through the pain, demonstrating the resilience that would come to define his professional career.
Path to Professional Baseball
King’s determination and performance at the collegiate level caught the attention of Major League Baseball scouts. The Texas Rangers selected him in the 10th round of the 2017 MLB Draft, using the 314th overall pick. He signed with the organization for a $10,000 signing bonus, officially beginning his professional journey.
Shortly after signing, King underwent Tommy John surgery on July 5, 2017, a common procedure for pitchers that required significant rehabilitation. He spent much of the 2018 season recovering, returning to the mound in September for a brief appearance with the Arizona League Rangers and the Spokane Indians. This setback tested his patience and commitment to the sport, but he pressed forward with his recovery and development.
John Edward King Career
Texas Rangers (2020–2023)
King’s persistence paid off when the Rangers selected his contract from Triple-A on September 4, 2020, promoting him to the major league roster. He made his MLB debut that same day against the Seattle Mariners. In his rookie season, King appeared in five games for Texas, posting a 1–0 record with a 6.10 earned run average and nine strikeouts over 10 and one-third innings of work.
The 2021 season proved to be a breakthrough year for King with the Rangers. He appeared in 41 games, registering a 7–5 record with a 3.52 ERA and 40 strikeouts across 46 innings. However, the season was cut short when he was placed on the injured list in July and underwent surgery for thoracic outlet syndrome in September. This surgery required another lengthy rehabilitation process, but King returned to competition in subsequent seasons.
In 2022, King split his time between Texas and the Triple-A Round Rock Express. With the Rangers, he went 1–4 with a 4.03 ERA and 30 strikeouts over 50 and one-third innings. He also made appearances with Round Rock, going 2–1 with a 7.27 ERA in the minor leagues. The 2023 season began with King optioned to Triple-A Round Rock before receiving another opportunity with the major league club. He made 15 appearances for Texas, recording a 5.79 ERA and a 1–1 record with 10 strikeouts across 18 and two-thirds innings.
St. Louis Cardinals (2023–2025)
A significant change in King’s career came on July 30, 2023, when the Texas Rangers traded him to the St. Louis Cardinals. The trade sent King along with Tekoah Roby and Thomas Saggese to St. Louis in exchange for Jordan Montgomery and Chris Stratton. This move placed King on a team with postseason aspirations and provided him a fresh opportunity.
King made an immediate impact with the Cardinals, appearing in 20 games out of the bullpen. He recorded an impressive 1.45 ERA with 10 strikeouts across 18 and two-thirds innings, showcasing his ability to contribute effectively in high-pressure situations. His performance earned him a role in the Cardinals’ bullpen for the following seasons.
To begin the 2024 season, King was optioned to Triple-A Memphis Redbirds, but he eventually rejoined the major league roster and appeared in 56 relief games throughout the year. He compiled a 3–3 record with a 2.85 ERA and 38 strikeouts over 60 innings of work, demonstrating consistency and durability as a reliever.
Miami Marlins (2026–Present)
Following the 2025 season, King became a free agent after being non-tendered by the Cardinals on November 21, 2025. He quickly found a new home, signing a one-year contract worth $1.5 million with the Miami Marlins on February 12, 2026. This move marked a new chapter in his career as he joined the Marlins organization for the 2026 season.
Driving Style and Strengths
King has established himself as a reliable left-handed reliever capable of handling multiple innings and various situations in the bullpen. His ability to pitch effectively against both left-handed and right-handed batters has made him a valuable asset for his teams. Throughout his career, he has demonstrated the mental toughness to bounce back from injuries and roster challenges, maintaining his effectiveness on the mound.
Notable Events and Milestones
King’s career has been marked by his perseverance through adversity, including two significant surgeries during his professional career. His MLB debut on September 4, 2020, represented the culmination of years of hard work following his Tommy John surgery in 2017. The trade to the St. Louis Cardinals in 2023 provided him with an opportunity to compete for a playoff-contending team, and his strong performance down the stretch that season cemented his place in the Cardinals’ bullpen plans.
John Edward King Career Wins
Across his MLB career spanning from 2020 through the 2025 season, King has accumulated a record of 21 wins and 15 losses, demonstrating his ability to contribute to his team’s success at the highest level of baseball.
Major League Baseball Highlights
King’s most successful season came in 2021 with the Texas Rangers, where he posted a 7–5 record with a 3.52 ERA. His 192 career strikeouts in MLB reflect his ability to miss bats and work through opposing lineups. His debut season in 2020 saw him earn his first major league win, while his 2024 campaign with the Cardinals featured a career-best 2.85 ERA over 60 innings of relief work.
Other Wins and Performances
Prior to reaching the majors, King demonstrated his pitching ability in the minor leagues. During the 2019 season, he went a combined 3–6 with a 2.37 ERA across Single-A and High-A levels with the Hickory Crawdads and Down East Wood Ducks. His strong minor league performance, particularly with Down East where he posted a 2.03 ERA over 71 innings, helped establish his credentials as a prospect worth developing.
| Competition Level | Wins | Losses | ERA | Strikeouts |
|---|---|---|---|---|
| MLB Career (2020–2025) | 21 | 15 | 3.59 | 192 |
| Minor Leagues (2019) | 3 | 6 | 2.37 | N/A |
John Edward King Family
Family Background and Racing Lineage
Specific details about John Edward King’s family background, including his parents, siblings, or any family connections to professional baseball, are not extensively documented in available sources. Publicly available information focuses primarily on his athletic career rather than his family history.
Personal Life
King graduated from William P. Clements High School in Sugar Land, Texas, before pursuing college baseball at Angelina College and later the University of Houston. His journey through Tommy John surgery and thoracic outlet syndrome surgery has been well documented, showcasing his dedication to overcoming adversity in his professional career. Information regarding his marital status, spouse, or children is not currently available in public sources.
2025 Season Performance
The 2025 season represented King’s second full year with the St. Louis Cardinals organization. He appeared in 51 games for the Cardinals, serving primarily as a left-handed specialist out of the bullpen. King registered a 2–1 record with a 4.66 ERA and 28 strikeouts across 48 and one-third innings pitched. While his ERA increased from his 2024 mark of 2.85, he remained a consistent presence in the Cardinals’ relief corps throughout the season.
Working alongside the Cardinals’ coaching staff, King contributed to a bullpen that faced various challenges throughout the campaign. His experience from previous seasons, including his time with the Rangers and his earlier year with the Cardinals, provided valuable depth and flexibility for manager Oli Marmol’s pitching staff.
Following the conclusion of the 2025 season on November 21, the Cardinals made the decision to non-tender King, making him a free agent. This marked the first time in his career that King entered the offseason without a contract guarantee for the following year. However, his track record of resilience and his ability to perform at the major league level positioned him as an attractive option for teams seeking experienced bullpen help during the 2025-2026 offseason.