The Seattle Mariners are finalizing a deal for star pitcher Luis Castillo of the Cincinnati Reds, sources told ESPN’s Jeff Passan on Friday night.
Minor leaguers Noelvi Marte, Levi Stoudt and Edwin Arroyo are headed to Cincy, sources said, along with veteran Dylan Moore. Marte, a shortstop, is the highest rated of the group, with ESPN’s Kiley McDaniel ranking him the 12th-best prospect in baseball ahead of the season.
The Mariners, led by star rookie Julio Rodriguez, entered Friday’s action 54-46, 11 games behind the first-place Houston Astros in the AL West and holding onto the second wild-card spot.
Now, they’re set to add the best available arm ahead of Tuesday’s trade deadline, one who will join an already-solid rotation that includes Robbie Ray and Logan Gilbert.
It will be a massive pickup for a Mariners team that has not reached the postseason since 2001, the longest active drought among the four major North American pro sports leagues (MLB, NFL, NBA, NHL).
A 29-year-old right-hander, Castillo is 4-4 with a 2.86 ERA in 14 starts for the Reds this season and has a career 3.62 ERA in six seasons, all with Cincinnati.
Castillo won’t be eligible for free agency until after the 2023 season, so the Mariners would have him for at least the rest of this year and all of next.
Castillo has bounced back from a career-worst season in 2021, when he lost 16 games and walked a league-high 75 batters. His changeup has been his best pitch for most of his career, but this year, he is actually throwing his four-seam fastball more, and doing so with a lot of success. Opponents have whiffed on 39% of their swings against his four-seamer, the highest rate of Castillo’s career and the highest of any pitcher in the majors (minimum 300 four-seamers thrown).
Castillo has a 1.38 ERA in four starts against the AL this year, second to the Los Angeles Dodgers’ Clayton Kershaw (0.69) among qualified pitchers.
The Reds have been moving veteran players for prospects since the end of the lockout earlier this year. In March, they traded Eugenio Suarez and Jesse Winker to the Mariners, and on Thursday, they traded outfielder Tyler Naquin and reliever Phillip Diehl to the New York Mets.
They’re getting a haul from Seattle in this trade, with Marte and Arroyo ranked among the team’s top 10 prospects ahead of the season by ESPN’s McDaniel.
Marte, 20, has spent the year for High-A Everett, hitting .275 with 15 home runs and a team-best 62 runs scored and 55 RBIs to go along with 13 steals entering Friday.
McDaniel ranked Arroyo, also a shortstop, as Seattle’s eighth-best prospect entering the season. The 18-year-old has spent the season at Single-A Modesto, hitting .316 with 76 runs, 67 RBIs, 13 home runs and 21 steals.
Stoudt, a 24-year-old right-hander, is 6-6 with a 5.28 ERA in 18 starts for Double-A Arkansas this season.
And the versatile Moore has spent the past four big league seasons in Seattle. He’s hitting .197 with five home runs and 16 RBIs this year.
Cincinnati infielder Brandon Drury also could be moved before Tuesday’s deadline, along with several Reds relievers.
ESPN’s Jesse Rogers contributed to this report.