On Tuesday night, the Seattle Mariners will play the second game of their series with the Athletics (at home).
They are coming off a 6-4 loss (on Monday).
Mariners Player Acquired By New MLB Team
GettyManager Dan Wilson #6 of the Seattle Mariners is interviewed before game six of the American League Championship Series against the Toronto Blue Jays at Rogers Centre on October 19, 2025 in Toronto, Ontario.
Before Tuesday’s game, the Mariners announced that one of their players had been claimed off waivers by the Colorado Rockies.
Mariners PR wrote: “RHP Blas Castaño claimed off waivers by the Colorado Rockies.”
RHP Blas Castaño claimed off waivers by the Colorado Rockies.
Castaño appeared in one game for Seattle last season.
Rockies Club Information wrote: “The Rockies announced today that they have claimed RHP Blas (BLASS) Castaño (cah-stah-no) off waivers from the Seattle Mariners and optioned him to Triple-A Albuquerque.
To make room on the 40-man roster, LHP Luis Peralta has been designated for assignment.”
To make room on the 40-man roster, LHP Luis Peralta has been designated for assignment.
MLB Social Media Reacts To Castaño News
GettyReliever Blas Castano #62 of the Seattle Mariners pitches during the seventh inning against the Washington Nationals at T-Mobile Park on May 28, 2025 in Seattle, Washington.
Here’s what people were saying about the transaction:
@SleeperRockies: “The #Rockies have claimed RHP Blas Castaño off waivers from the Mariners and optioned him to AAA Albuquerque. Blas (27) only has one big league appearance where he gave up 3 over 3 IP. Last year in AAA he had a 5.19 ERA over 126.2 IP 🏔️”
@EricSmi11284735: “Not a great loss”
@JDrewsyBC: “Have at it Rockies!🤣🤣”
Thomas Harding: “RHP Blas Castaño, whom the #Rockies just claimed from the #Mariners and optioned to the @ABQTopes, has all of his Minor League options.”
GettyBlas Castaño #62 of the Seattle Mariners pitches during the eighth inning of the spring training game against the Chicago White Sox at Peoria Stadium on February 24, 2026 in Peoria, Arizona.
Castaño has been good in Triple-A this season, going 3-1 with a 1.42 ERA in six games.
The 27-year-old will be an intriguing addition to the Rockies organization.
Mariners And Rockies Right Now
The Mariners are currently the fourth-place team in the American League West with a 10-14 record in 24 games.
They are 9-6 in the 15 games they have played at home in Seattle.
Following the Athletics, the Mariners will play their next series on Friday night when they visit the St. Louis Cardinals.
GettyManager Dan Wilson #6 of the Seattle Mariners looks on before the game against the Houston Astros at T-Mobile Park on April 11, 2026 in Seattle, Washington.
On the other side, the Rockies are currently the last-place team in the National League West with a 9-14 record in 23 games.
They will open up a series with the San Diego Padres on Tuesday night in Denver.
At home, the Rockies have gone 6-4 in ten games.
Seattle Mariners Player Officially Acquired By New MLB Team