Seranthony Ambioris Domínguez Taveras Bio
Seranthony Ambioris Domínguez Taveras is a Dominican professional baseball pitcher who has played in Major League Baseball for the Philadelphia Phillies, Baltimore Orioles, Toronto Blue Jays, and Chicago White Sox. Born in Esperanza Valverde Mao, Dominican Republic, on November 25, 1994, he signed with the Philadelphia Phillies as an international free agent in October 2011 for $25,000. He made his Major League Baseball debut on May 7, 2018. Over his career, he has established himself as a reliable relief pitcher with a powerful fastball and an impressive strikeout ability.
Early Life and Background
Domínguez was born in Esperanza Valverde Mao, Dominican Republic. His unusual first name became a point of curiosity, and when Baseball America asked him about its origin, he explained that he believed his parents had heard it on television. Growing up in the Dominican Republic, he developed a passion for baseball at a young age, following in the footsteps of countless compatriots who have risen to prominence in professional baseball.
The Dominican Republic is renowned worldwide for producing elite baseball talent, and Domínguez grew up immersed in that baseball culture. He began his journey toward professional baseball in his home country before eventually signing with the Phillies organization.
Path to Major League Baseball
Domínguez signed with the Philadelphia Phillies as an international free agent in October 2011 for $25,000. He made his professional debut in 2012 with the Dominican Summer League Phillies, where he went 4-4 with a 3.48 earned run average and 40 strikeouts in 67 and one-third innings across 15 games. He spent the entire season with the DSL team, making 11 starts.
In 2013, he returned to the Dominican Summer League and compiled a 4-6 record with a 2.96 ERA and 58 strikeouts in 76 innings across 14 starts. He led the Dominican Summer League in shutouts with two and in complete games with two. His performance over these two seasons in the DSL laid the foundation for his progression through the Phillies farm system.
From 2014 through 2017, Domínguez steadily climbed the minor league ladder, playing for various affiliates including the Gulf Coast League Phillies, Williamsport Crosscutters, Lakewood BlueClaws, and Clearwater Threshers. In 2017 with Clearwater, he posted a 4-4 record with a 3.61 ERA and 75 strikeouts in 62 and one-third innings, averaging 10.8 strikeouts per nine innings. He was named a Florida State League Mid-Season All-Star. Following that season, the Phillies added him to their 40-man roster to protect him from the Rule 5 draft. In the off-season, the organization informed him he would be converted from a starting pitcher to a relief pitcher.
Seranthony Ambioris Domínguez Taveras Career
Philadelphia Phillies Breakthrough (2018–2024)
Domínguez began 2018 with the Double-A Reading Fightin Phils, posting a 1-2 record with a 2.08 ERA and 18 strikeouts in 13 innings across eight games. He earned a promotion to Triple-A Lehigh Valley IronPigs in late April, where he was 1-0 with a 0.00 ERA in three games. The Phillies promoted him to the major leagues on May 7, 2018, and he made his MLB debut that same night.
Domíngue’s debut season was historic. He became the only major league reliever in recorded baseball history to record at least two outs while allowing no runs, hits, or walks in his first five major-league appearances. He also became the first pitcher in recorded history to not allow a run, hit, or walk in his first six appearances. He recorded his first career save against the St. Louis Cardinals on May 19 and earned his first win on May 26. He tied the all-time record for most perfect appearances in a pitcher’s first 11 games and pitched more innings in those games than any other pitcher with whom he was tied. His 0.65 WHIP through the All-Star break was the lowest ever by any Phillies reliever with at least 30 innings pitched. For the 2018 season, he was 2-5 with 16 saves and a 2.95 ERA, striking out 74 batters in 58 innings. He earned spots on Baseball America’s MLB All-Rookie Team and Baseball Digest’s Rookie All-Star team.
In 2019, he went 3-0 with a 4.74 ERA in 24 relief appearances, striking out 29 batters, but his season ended early due to a damaged ulnar collateral ligament in his right elbow. He underwent Tommy John surgery on July 30, 2020. He spent most of 2021 recovering and was activated off the injured list on September 1, 2021. In 2022, he returned strongly with a 6-5 record, nine saves, and a 3.00 ERA across 54 relief appearances, striking out 61 batters. He earned the save in Game 3 of the NLCS against the San Diego Padres during the postseason, allowing two earned runs while striking out 18 hitters in 10 and two-thirds playoff innings. He signed a two-year, $7.25 million contract extension with the Phillies in February 2023. In 2023, he posted a 3.78 ERA with 48 strikeouts in 50 innings across 57 appearances. He made 38 appearances in 2024 with a 4.75 ERA and 40 strikeouts in 36 innings. He was the second longest-tenured Phillie behind Aaron Nola before being traded.
Baltimore Orioles (2024–2025)
On July 26, 2024, the Phillies traded Domínguez to the Baltimore Orioles alongside Cristian Pache in exchange for outfielder Austin Hays. He made 25 appearances down the stretch for Baltimore, posting an 0-2 record with a 3.97 ERA, 28 strikeouts, and 10 saves across 22 and two-thirds innings pitched.
He continued with the Orioles into 2025, making 43 relief appearances and compiling a 2-3 record with a 3.24 ERA, 54 strikeouts, and two saves across 41 and two-thirds innings pitched. His tenure with the Orioles demonstrated his consistency as a reliable late-inning option out of the bullpen.
Toronto Blue Jays (2025)
On July 29, 2025, between games of a doubleheader between the Orioles and Blue Jays, Domínguez was traded to Toronto in exchange for pitching prospect Juaron Watts-Brown and cash considerations. Interestingly, during the second game of that doubleheader, he tossed a scoreless inning against his former team. He finished the 2025 season with 24 appearances for the Blue Jays, logging a 2-1 record and 3.00 ERA with 25 strikeouts over 21 innings of work.
Driving Style and Strengths
Domíngue’s stuff features a four-seam fastball and sinker, both reaching up to 101 miles per hour. His slider averaged 89 miles per hour and generated a whiff rate above 50 percent since his debut in 2018. He also threw a changeup at 90-92 miles per hour. In 2025, he expanded his arsenal by adding a sweeper to replace his slider, along with a splitter and curveball, which greatly improved his effectiveness against left-handed hitters.
Seranthony Ambioris Domínguez Taveras Career Wins
Domíngue has accumulated 26 wins and 26 losses across his Major League Baseball career through June 26, 2026. He has recorded 395 strikeouts and 52 saves while maintaining a 3.57 earned run average.
MLB Highlights
His most successful single-season win totals came during his time with the Philadelphia Phillies. His 2022 season stands out as particularly strong, as he went 6-5 with nine saves and a 3.00 ERA in 54 relief appearances while helping the Phillies advance deep into the postseason. His 2018 rookie season established him as an immediate impact reliever with 16 saves and a 2.95 ERA. His ability to miss bats and generate swings and misses has been a consistent hallmark throughout his career, with his strikeout-per-nine-innings rate consistently ranking among the league leaders for relievers.
Other Achievements
Beyond his MLB statistics, Domínguez earned recognition as a Florida State League Mid-Season All-Star in 2017 during his minor league career with the Clearwater Threshers. His historic start to his major league career in 2018 set records that had never been matched by any reliever making their debut. He represented the Dominican Republic in international competition during the 2026 World Baseball Classic.
| Team | Years | W-L | ERA | SV | SO |
|---|---|---|---|---|---|
| Philadelphia Phillies | 2018-2019, 2021-2024 | 17-15 | 3.40 | 25 | 252 |
| Baltimore Orioles | 2024-2025 | 2-5 | 3.58 | 12 | 82 |
| Toronto Blue Jays | 2025 | 2-1 | 3.00 | 0 | 25 |
Seranthony Ambioris Domínguez Taveras Family
Family Background and Racing Lineage
Domíngue’s baseball lineage connects him to the Dominican Republic’s rich tradition of producing professional baseball players. His roots in Esperanza Valverde Mao place him among the many talented athletes who have emerged from that region.
Personal Life
Domíngue is married to Sarahi Dominguez. Together, they have two sons. He maintains his connection to his Dominican heritage while pursuing his professional baseball career in North America.
2025 Season Performance
The 2025 season marked a transitional year for Domínguez as he split time between the Baltimore Orioles and Toronto Blue Jays following a mid-season trade. He appeared in 43 games for the Orioles before the move, posting a 3.24 earned run average with 54 strikeouts across 41 and two-thirds innings while recording two saves.
After joining the Blue Jays in late July, he appeared in 24 games and recorded a 2-1 record with a 3.00 earned run average and 25 strikeouts in 21 innings, earning two wins during the Blue Jays’ stretch run. His ability to slot into different bullpen roles and deliver in high-leverage situations made him a valuable asset for both organizations during the season.
His second half with the Blue Jays demonstrated his adaptability and reliability as a bullpen arm capable of handling pressure situations. His performance positioned him as a trusted option in late-inning scenarios for the Blue Jays down the stretch. Heading into 2026, his proven track record and expanded pitch arsenal set the stage for continued success in his next chapter with the Chicago White Sox.