Tanner Rainey Bio
Tanner Scott Rainey (born December 25, 1992) is an American professional baseball pitcher currently in the Detroit Tigers organization. A reliever known for a high-velocity fastball, Rainey has pitched in Major League Baseball (MLB) for the Cincinnati Reds, Washington Nationals, and Pittsburgh Pirates. He was selected by the Reds in the second round of the 2015 MLB draft and debuted in the majors in 2018. He won a World Series ring as a member of the 2019 Washington Nationals.
Early Life and Background
Tanner Scott Rainey was born on December 25, 1992, and grew up in Louisiana. He attended St. Paul’s School in Covington, Louisiana, where he played high school baseball and emerged as a two-way prospect. After high school, Rainey continued his development as a pitcher and first baseman at Southeastern Louisiana University before transferring to the University of West Alabama to finish out his college career.
At Southeastern Louisiana and West Alabama, Rainey showed the kind of arm strength that catches the eye of professional scouts. As a pitcher, he worked primarily out of the bullpen at the collegiate level, flashing a fastball that sat in the upper 90s. By the time he declared for the 2015 MLB draft, he had cemented his identity as a hard-throwing reliever rather than a position player.
Path to Professional Baseball
Rainey’s path to the majors began in earnest during the 2015 MLB draft, when the Cincinnati Reds selected him in the second round. He signed with the organization and made his professional debut that summer with the Billings Mustangs, where he posted a 2–2 record and 4.27 ERA in 15 starts. The Reds immediately used him as a starting pitcher in his first professional season.
In 2016, Rainey advanced to the Dayton Dragons and posted a 5–10 record with a 5.57 ERA in 29 games, including 20 starts. The Reds shifted him into a full-time relief role in 2017, and the move paid off. Splitting time between the Daytona Tortugas and the Pensacola Blue Wahoos, he compiled a combined 3–3 record and 3.19 ERA in 53 relief appearances, striking out 104 batters in just 62 innings. His performance in the minor leagues that season earned him an invitation to Cincinnati’s big-league spring training camp in 2018.
Tanner Rainey Career
Early Career (2015–2017)
Drafted in the second round of the 2015 MLB draft by the Cincinnati Reds, Rainey began his professional career as a starter with the Billings Mustangs. The Reds converted him to a relief role in 2017, a change that suited his high-velocity arsenal. That season, he struck out 104 batters in 62 innings across two levels of the Reds’ farm system, signaling that his future in the organization would be in the bullpen.
Cincinnati Reds (2018)
Rainey made his Major League debut on April 10, 2018, against the Philadelphia Phillies, pitching one inning of relief. In eight games with the Reds that year, he struggled to a 24.23 ERA across seven innings. On December 12, 2018, Cincinnati traded him to the Washington Nationals for pitcher Tanner Roark, opening a new chapter in his career.
Washington Nationals Breakthrough (2019–2024)
After starting 2019 in the minors, Rainey was called up by Washington on May 18, 2019, and quickly became one of manager Dave Martinez’s most-used relievers. He picked up his first big-league win on June 1, 2019, beating his former Reds teammates at Great American Ball Park. Across 52 relief appearances that season, he went 2–3 with a 3.91 ERA and 74 strikeouts in 48⅓ innings, though he also issued 38 walks. The Nationals captured the 2019 World Series title over the Houston Astros, giving Rainey his first championship ring.
Rainey followed up in 2020 with a strong 2.66 ERA in 20⅓ innings, but a forearm issue ended his campaign in mid-September. He returned in 2021 only to post a 7.39 ERA across 38 appearances, a season disrupted by inconsistency. In 2022, however, he regained his form with a 3.30 ERA and 12 saves in 29 games before a torn ulnar collateral ligament in his right elbow led to Tommy John surgery on August 3, 2022.
Rainey came back on September 29, 2023, to make his season debut and pitched a full 2024 campaign with the Nationals, recording a 4.76 ERA and 44 strikeouts in 51 innings across 50 appearances. On November 22, 2024, Washington non-tendered him, making him a free agent.
Pittsburgh Pirates (2025)
On December 7, 2024, Rainey signed a minor league deal with the Pittsburgh Pirates and opened 2025 at Triple-A Indianapolis. The Pirates selected his contract on May 3, 2025, and he made 11 appearances, though he struggled to a 10.57 ERA. Pittsburgh designated him for assignment on June 2, and after clearing waivers and rejecting an outright assignment, he became a free agent on June 4. He re-signed with the Pirates on a minor league deal on June 10 before being released on July 8.
Detroit Tigers (2025)
On July 18, 2025, Rainey signed a minor league contract with the Detroit Tigers and was assigned to the Triple-A Toledo Mud Hens. He excelled there, going 1–0 with a 2.66 ERA, 33 strikeouts, and one save across 23⅔ innings in 19 appearances. Detroit selected his contract on September 21, 2025, and he made two appearances for the Tigers. The club designated him for assignment on November 18 and non-tendered him three days later, but he re-signed with the Tigers on a minor league deal on November 26, 2025.
Driving Style and Strengths
Rainey is a power reliever who relies on a high-velocity fastball that touches the upper 90s, paired with a sharp slider. His strikeout numbers have been a hallmark of his career, though high walk rates have at times held him back from full consistency. When his command is on, he profiles as a late-inning arm capable of handling high-leverage spots.
Notable Events and Milestones
Rainey’s signature accomplishment is his role on the 2019 World Series champion Washington Nationals. He recorded six strikeouts in 6⅔ playoff innings that postseason, including finishing Game 3 of the 2019 National League Championship Series, the first NLCS game ever played at Nationals Park. He also navigated Tommy John surgery to return to the majors in 2023.
Tanner Rainey Career Wins
Through the 2025 season, Rainey has compiled a 5–11 win–loss record with a 5.52 career ERA and 247 strikeouts in MLB. His win total is modest because of his relief role, but his strikeout numbers and one World Series ring underscore his value in the bullpen.
MLB Highlights
Rainey earned his first MLB win on June 1, 2019, in relief against the Cincinnati Reds. His biggest career highlight came that same season, when he was part of the Washington Nationals team that won the 2019 World Series. He has also posted a 3.30 ERA season in 2022 with 12 saves, marking his strongest all-around year in the majors before injury intervened.
Tanner Rainey Family
Family Background and Racing Lineage
Rainey’s family ties to baseball were forged through his own journey, as he is the first in his immediate family to reach the major leagues. He grew up in Louisiana and credits his family for supporting his development as a pitcher from a young age.
Personal Life
Tanner Rainey is married to his wife, Kelsey. The couple has two children: a son, Ryker Scott, born on December 7, 2021, and a daughter, Rory Rae, born on January 26, 2023. The family has been a steady presence throughout his career, including during his recovery from Tommy John surgery in 2022.
2025 Season Performance
The 2025 season was a year of transition for Tanner Rainey. He opened the year in the Pittsburgh Pirates system, earned a brief call-up in May, and bounced between Triple-A Indianapolis and the majors before being released in July. After joining the Detroit Tigers organization later that month, he thrived at Triple-A Toledo, posting a 2.66 ERA with 33 strikeouts in 23⅔ innings.
Detroit added him to the major league roster on September 21, 2025, and he appeared in two games down the stretch. He was designated for assignment on November 18 and non-tendered three days later, only to re-sign with the Tigers on a minor league deal on November 26. His 2025 numbers reflect a pitcher still capable of missing bats, even as he searched for stability at the MLB level.
