Blas Castaño

Blas Castaño
Colorado Rockies – No. 63
Pitcher
Born: (1998-09-08) September 8, 1998
Espaillat, Dominican Republic
Bats: Right
Throws: Right
MLB debut
May 28, 2025, for the Seattle Mariners
MLB statistics
(through June 16, 2026)
Win–loss record1–0
Earned run average4.56
Strikeouts18
Stats at Baseball Reference 
Teams

Blas Castaño (born September 8, 1998) is a Dominican professional baseball pitcher for the Colorado Rockies of Major League Baseball (MLB). He made his MLB debut in 2025 with the Seattle Mariners.

Career

New York Yankees

Castaño signed with the New York Yankees on June 1, 2018 and joined the Dominican Summer League Yankees that summer. He made his stateside debut in 2019 with the rookie-level Gulf Coast League Yankees. Castaño did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[1]

Castaño returned to action in 2021 with the rookie-level Florida Complex League Yankees and Single-A Tampa Tarpons. In 10 appearances (eight starts) split between the two affiliates, he accumulated a 6/2 record and 4.17 ERA with 55 strikeouts across 45+1⁄3 innings pitched.[2] Castaño split the 2022 campaign between the High-A Hudson Valley Renegades and Double-A Somerset Patriots, pitching to a cumulative 5-9 record and 3.86 ERA with 103 strikeouts over 22 appearances (21 starts).[3]

Castaño spent the majority of the 2023 season with the Double-A Somerset Patriots, also making two appearances for the Triple-A Scranton/Wilkes-Barre RailRiders; in 17 outings for Somerset, he logged a 4-3 record and 4.76 ERA with 42 strikeouts.[4] Castaño was released by the Yankees organization on August 8, 2023.

Seattle Mariners

On August 11, 2023, Castaño signed a minor league contract with the Seattle Mariners and spent the rest of the season with the Double-A Arkansas Travelers.[5] Castaño split the 2024 campaign between Double-A Arkansas and the Triple-A Tacoma Rainiers. In 29 games (26 starts) for the two affiliates, he accumulated a 5–8 record and 4.38 ERA with 108 strikeouts across 125+1⁄3 innings pitched.[6] On November 4, 2024, the Mariners added Castaño to their 40-man roster to prevent him from reaching minor league free agency.[7]

Castaño was optioned to Triple-A Tacoma to begin the 2025 season.[8] In 10 appearances (7 starts), he logged a 2-1 record and 3.43 ERA with 28 strikeouts across 44+2⁄3 innings pitched. On May 23, Castaño was promoted to the major leagues for the first time.[9][10] He pitched in one MLB game, allowing three runs, including Robert Hassell III's first MLB home run, in the final three innings of a loss to the Washington Nationals on May 28. Castaño returned to Tacoma, where he pitched the rest of the season.[11][12]

Castaño was optioned to Triple-A Tacoma to begin the 2026 season.[13] He made six appearances for the Rainiers, logging a 3-1 record and 1.42 ERA with four strikeouts across 6+1⁄3 innings pitched. On April 14, 2026, Castaño was designated for assignment by the Mariners.[14]

Colorado Rockies

On April 21, 2026, the Colorado Rockies claimed Castaño off waivers.[15]

References

  1. ↑ "2020 Minor League Baseball season cancelled". mlb.com. Retrieved May 14, 2025.
  2. ↑ "Blas Castaño - Stats - Pitching". fangraphs.com. Retrieved September 20, 2025.
  3. ↑ "Blas Castano Stats & Scouting Report". baseballamerica.com. Retrieved September 20, 2025.
  4. ↑ "Blas Castano - Baseball Statistics". thebaseballcube.com. Retrieved September 20, 2025.
  5. ↑ "Blas Castano Stats, Age, Position, Height, Weight, Fantasy & News". Minor League Baseball. Retrieved 2024-11-24.
  6. ↑ "Mariners Select Blas Castano". mlbtraderumors.com. November 4, 2024. Retrieved November 8, 2024.
  7. ↑ "Mariners Select RHP Blas Castano From Triple-A Tacoma". marinersblogs.mlblogs.com. November 4, 2024. Retrieved November 8, 2024.
  8. ↑ "Mariners' Blas Castano: Optioned to Triple-A". CBS Sports. 2025-03-07. Retrieved 2025-12-24.
  9. ↑ Adams, Steve (May 23, 2025). "Mariners Designate Jesse Hahn For Assignment". MLB Trade Rumors. Retrieved 2025-11-27.
  10. ↑ Stecker, Brent (2025-05-23). "Seattle Mariners Moves: Rookie RHP gets the call, Hahn DFA'd". Seattle Sports. Retrieved 2025-05-23.
  11. ↑ "Hassell's homer sign of 'swinging with some intent' in latest stint with Nats". MLB.com. Retrieved 2026-03-11.
  12. ↑ "Blas Castano 2025 Minor & Winter Leagues Game Logs & Splits". Baseball-Reference.com. Retrieved 2026-03-11.
  13. ↑ "Mariners' Spring Cuts Offer a Sobering Reminder for Lazaro Montes". si.com. Retrieved March 25, 2026.
  14. ↑ "Mariners Select Patrick Wisdom". mlbtraderumors.com. Retrieved April 27, 2026.
  15. ↑ "Rockies Claim Blas Castaño, Designate Luis Peralta For Assignment". mlbtraderumors.com. Retrieved April 21, 2026.
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