Houston Astros minor league players

This a partial list of Minor League Baseball players in the Houston Astros system and the rosters of their minor league affiliates.

Players

Kevin Alvarez

Kevin Reynaldo Alvarez (born January 13, 2008) is a Cuban professional baseball outfielder in the Houston Astros organization.

Alvarez was born in Cuba and left in 2021 to live in the Dominican Republic. He was rated among the top international prospects in the 2025 class and signed with the Houston Astros in January 2025. He made his professional debut that year with the Dominican Summer League Astros.

Alvarez started the 2026 season with the Fayetteville Woodpeckers.

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Sam Carlson

Samuel Carlson (born December 3, 1998) is an American professional baseball pitcher in the Houston Astros organization.

Carlson attended Burnsville High School in Burnsville, Minnesota. During his senior year, Carlson had a jump in velocity, going from the 88–92 miles per hour range to 93–97. He posted a 0.93 ERA (9th in state and 2nd on Burnsville) and 53 strikeouts (28th in state) over 34 innings, and was named Minnesota Mr. Baseball. He committed to play college baseball for the Florida Gators.

Carlson was selected in the second round, with the 55th overall selection, of the 2017 Major League Baseball draft by the Seattle Mariners. He signed with the Mariners for $2 million. He made his professional debut with the Arizona League Mariners, pitching only three innings before being shut down due to minor elbow discomfort.

Heading into the 2018 season, Carlson was named Seattle's third ranked prospect and the top pitching prospect in the organization, but had elbow discomfort return during the Mariners mini-camp in February and was shut down again. He was given a platelet-rich injection and eventually started rehabbing, but a setback in his rehab forced him to undergo Tommy John surgery on July 2, causing him to miss the rest of 2018 and all of the 2019 season. Carlson returned healthy in 2020, but did not play a game after the minor league season was cancelled due to the COVID-19 pandemic. For the 2021 season, he was assigned to the Single-A Modesto Nuts, starting 19 games with a 6–4 record, 4.77 ERA, and 112 strikeouts in 100 innings.

In 2022, Carlson made 16 appearances (11 starts) for Modesto, recording a 4.61 ERA with 60 strikeouts across 56+2⁄3 innings of work. He spent 2023 with the High-A Everett AquaSox, pitching in 39 games and logging a 5.25 ERA with 61 strikeouts and six saves. As a six-year minor league veteran, Carlson elected free agency on November 6.

On November 30, 2023, Carlson signed a minor league contract with the Milwaukee Brewers. He pitched 44 games in relief for the Double-A Biloxi Shuckers in 2024, going 4–2 with a 4.25 ERA and 51 strikeouts in 48+2⁄3 innings. Carlson elected free agency following the season on November 4, 2024.

On December 13, 2024, Carlson signed a minor league contract with the Los Angeles Dodgers. He pitched in 45 games for the Triple-A Oklahoma City Comets, posting a 4–2 record and 4.22 ERA with 78 strikeouts. Carlson elected free agency following the season on November 6, 2025.

On December 27, 2025, Carlson signed a minor league contract with the Houston Astros.

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Trey Dombroski

Howard Joseph Dombroski (born March 13, 2001) is baseball pitcher in the Houston Astros organization. He played college baseball for the Monmouth Hawks.

Dombroski grew up in Manasquan, New Jersey and attended Wall High School. He was named the NJ.com Pitcher of the Year as a senior.

Dombroski's freshman season was cut short by COVID-19. As a sophomore, he went 5-1 with a 2.73 ERA. After the season, Dombroski played for the Harwich Mariners of the Cape Cod Baseball League and was named the league Pitcher of the Year. As a junior, he was named the MAAC Pitcher of the Year.

Dombroski was selected in the fourth round in the 2022 Major League Baseball draft by the Houston Astros. He signed with the Astros on July 23, 2022, and received a $443,900 signing bonus.

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Cole Hertzler

Cole Garrett Hertzler (born June 21, 2003) is an American professional baseball pitcher in the Houston Astros organization.

Hertzler attended Boyertown High School in Boyertown, Pennsylvania and played college baseball at Liberty University. He was selected by the Houston Astros in the fourth round of the 2024 Major League Baseball draft.

Hertzler made his professional debut in 2024 with the Fayetteville Woodpeckers and played 2025 with them. He started 2026 Asheville Tourists before being promoted to the Corpus Christi Hooks.

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Michael Knorr

Michael Jacob Knorr (born May 12, 2000) is an American professional baseball pitcher in the Houston Astros organization.

Knorr attended Carlsbad High School in Carlsbad, California. He was selected by the San Diego Padres in the 40th round of the 2018 Major League Baseball draft, but did not sign. He played three years of college baseball at California State University, Fullerton before transferring to Coastal Carolina University in 2022.

After one year at Coastal Carolina, Knorr was selected by the Houston Astros in the third round of the 2022 Major League Baseball draft. He signed with the Astros and spent his first professional season in 2023 with the Fayetteville Woodpeckers and Asheville Tourists. He started 2024 with the Corpus Christi Hooks.

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Bryce Mayer

Bryce Matthew Mayer (born February 11, 2002) is an American professional baseball pitcher in the Houston Astros organization.

Mayer attended St. Francis Borgia High School in Washington, Missouri and played college baseball at St. Charles Community College and the University of Missouri. He was selected by the Houston Astros in the 16th round of the 2024 Major League Baseball draft.

Mayer made his professional debut in 2024 with the Fayetteville Woodpeckers. He started 2025 with Fayetteville and was promoted to the Asheville Tourists and Corpus Christi Hooks during the season.

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Jackson Nezuh

Jackson Thomas Nezuh (born February 11, 2002) is an American professional baseball pitcher in the Houston Astros organization.

Nezuh attended TNXL Academy in Ocoee, Florida and played college baseball at Florida State University for two seasons before transferring to University of Louisiana at Lafayette. In 2022, he played collegiate summer baseball with the Brewster Whitecaps of the Cape Cod Baseball League. After one year at Louisiana, he was selected by the Houston Astros in the 14th round of the 2023 Major League Baseball draft.

Nezuh made his professional debut in 2024 with the Fayetteville Woodpeckers and ended the season with the Asheville Tourists. He started 2025 with the Corpus Christi Hooks.

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Ethan Pecko

Ethan John Pecko (born August 25, 2002) is an American professional baseball pitcher in the Houston Astros organization.

Pecko grew up in Ridley Park, Pennsylvania and attended Ridley High School in Folsom, Pennsylvania. After graduating in 2020, he enrolled at La Salle University but missed his freshman year in 2021 after undergoing UCL surgery. La Salle eliminated baseball following the 2021 season, and Pecko transferred to Towson University. As a redshirt sophomore in 2023, he went 2-2 with a 3.21 ERA and 48 strikeouts. After the season, he played collegiate summer baseball in the Northwoods League with the Wausau Woodchucks. Pecko was selected by the Houston Astros in the sixth round of the 2023 Major League Baseball draft.

Pecko made his professional debut in 2023 with the Florida Complex League Astros and also spent time with the Fayetteville Woodpeckers. Over 15 innings, he posted a 6.60 ERA. Pecko was assigned to Fayetteville to open 2024 and was promoted to the Asheville Tourists and Corpus Christi Hooks during the season. Over 26 games (15 starts) between the three teams, Pecko went 4-6 with a 3.47 ERA and 125 strikeouts over 96 innings and was named the Astros 2024 Minor League Pitcher of the Year. He was assigned to Corpus Christi to open the 2025 season, missing some time due to injury and rehabbing in the Complex League. Over 11 games with Corpus Christi, Pecko posted a 4.40 ERA and 45 strikeouts. In early August, he was promoted to the Sugar Land Space Cowboys. Over eight games with Sugar Land to end the season, Pecko went 1-4 with a 3.09 ERA and 48 strikeouts over 35 innings. Pecko opened the 2026 season on the injured list with thoracic outlet syndrome before rehabbing with Fayetteville and then being assigned to Sugar Land.

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Alex Santos

Alex Zavier Santos (born February 10, 2002) is an American professional baseball pitcher in the Houston Astros organization.

Santos grew up in The Bronx and attended Mount Saint Michael Academy. He had committed to play college baseball at Maryland.

Santos was selected in the 2nd round of the 2020 MLB draft by the Houston Astros. He signed with the team and received a $1.25 million signing bonus. Santos spent the 2021 season with the Fayetteville Woodpeckers of the Low-A East and posted a 2–2 record with a 3.46 ERA and 48 strikeouts in 41+2⁄3 innings pitched.

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Jason Schiavone

Jason Christopher Schiavone (born March 19, 2003) is an American professional baseball catcher in the Houston Astros organization.

Schiavone attended St. John's College High School in Washington, D.C. and played college baseball at James Madison University (JMU). He was selected by the Houston Astros in the 11th round of the 2024 Major League Baseball draft.

Schiavone made his professional debut in 2024 with the Fayetteville Woodpeckers and played 2025 with Fayetteville and Asheville Tourists. He started 2026 with Asheville before being promoted to the Corpus Christi Hooks.

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Joseph Sullivan

Patrick Joseph Sullivan III (born July 1, 2002) is an American professional baseball outfielder in the Houston Astros organization.

Sullivan attended Vestavia Hills High School in Vestavia Hills, Alabama, where he played baseball. As a senior in 2021, he hit .402 with thirty RBIs. After graduating, he enrolled at the University of South Alabama where he played college baseball for the Jaguars. As a sophomore in 2023, he played in 52 games and batted .304 with 13 home runs, 44 RBIs, and twenty stolen bases. Sullivan missed time during his junior season due to a wrist injury, but still started 38 games and hit .266 with nine home runs and 32 RBIs. After the season, he was selected by the Houston Astros in the seventh round of the 2024 Major League Baseball draft.

Sullivan signed with the Astros for $239,900. After signing, he made his professional debut with the Fayetteville Woodpeckers, hitting .250 with five doubles over twenty games. Sullivan was a non-roster invitee to 2025 spring training, and hit Houston's first home run of the spring. He was assigned to the Asheville Tourists to open the 2025 season. In July, he was promoted to the Corpus Christi Hooks. Over 106 games between the two teams, Sullivan hit .220 with 17 home runs, 49 RBIs, and 42 stolen bases. He was assigned to play in the Arizona Fall League with the Scottsdale Scorpions after the season. Sullivan was assigned to Corpus Christi to begin the 2026 season.

Sullivan's grandfather, Pat Sullivan, won the 1971 Heisman Trophy.

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Alonzo Tredwell

Alonzo Slote Tredwell III (born May 8, 2002) is an American professional baseball pitcher in the Houston Astros organization.

Tredwell was born in Marblehead, Massachusetts, but moved to Orange County, California at the age of five. He grew up in Coto de Caza, California attended Mater Dei High School in Santa Ana, California. He played college baseball for the UCLA Bruins. In Tredwell's freshman season, he pitched in 47 innings, posting a 2.11 ERA, and 62 strikeouts, leading to him being named a consensus Freshman All-American and earning All-Pac 12 honors. In 2022 Tredwell had a bit of a step down pitching a 3.57 ERA and 51 strikeouts against only 12 walks in 45 and 1⁄3 innings. Then in 2023 Tredwell started in nine games, having a 3.57 ERA.

Tredwell was drafted by the Houston Astros in the second round with the 61st pick of the 2023 Major League Baseball draft. On July 18, 2023, he signed with the Astros for $1,497,500.

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Full Triple-A to Rookie League rosters

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