LUIS F. CASTILLO
0-0  W-L  •
2.71  WHIP  •
7.71  ERA 
0-0 W-L
2.71 WHIP
7.71 ERA
MLB > TEAMS >

LUIS F. CASTILLO NEWS

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INJURIES
Accepts assignment with Triple-A Castillo was sent outright to Triple-A Norfolk on Monday, Rich Dubroff of BaltimoreBaseball.com reports.
Impact Castillo was booted from the team's 40-man roster June 29 and will continue on with the organization in the minor leagues. He's yet to debut for the Tides this season but logged four starts earlier in the year with Triple-A Tacoma, accruing a 5.02 ERA and 1.13 WHIP with a 12:5 K:BB across 14.1 frames.
JULY 7, 2025 • ROTOWIRE
Dropped from 40-man roster The Orioles designated Castillo (undisclosed) for assignment Sunday.
Impact Shortly after the Orioles claimed him off waivers from the Mariners on May 7, Castillo was placed on Triple-A Norfolk's 7-day injured list due to an unspecified injury. He made pair of rehab starts in the rookie-level Florida Complex League earlier this month and was reinstated from Norfolk's IL on Sunday, only to be simultaneously removed from the Orioles' 40-man roster. The Orioles selected the contract of right-hander Matt Bowman from Triple-A in a corresponding move.
JUNE 29, 2025 • ROTOWIRE
Dropped from 40-man roster The Orioles designated Castillo (undisclosed) for assignment Sunday.
Impact Shortly after the Orioles claimed him off waivers from the Mariners on May 7, Castillo was placed on Triple-A Norfolk's 7-day injured list due to an unspecified injury. He made pair of rehab starts in the rookie-level Florida Complex League earlier this month and was reinstated from Norfolk's IL on Sunday, only to be simultaneously removed from the Orioles' 40-man roster. The Orioles selected the contract of right-hander Matt Bowman from Triple-A in a corresponding move.
JUNE 29, 2025 • ROTOWIRE
Yet to debut for new organization Triple-A Norfolk placed Castillo on its 7-day injured list May 13 due to an unspecified injury.
Impact After being acquired from the Mariners on May 7 and claiming a spot on the Orioles' 40-man roster, Castillo has yet to make his organizational debut. He may have gotten hurt during his final appearance with Triple-A Tacoma on May 3, though any potential injury didn't prevent him from passing a physical before the trade was made official. Once he's healthy, Castillo should occupy a spot in the Norfolk rotation.
MAY 27, 2025 • ROTOWIRE
Deadspin | Orioles acquire RHP Luis F. Castillo from Mariners Deadspin | Orioles acquire RHP Luis F. Castillo from Mariners
MAY 8, 2025 • DEADSPIN.COM
Orioles trade for Mariners pitcher Luis Castillo. No, not that one. The Orioles acquired right-hander Luis F. Castillo from the Seattle Mariners for cash considerations on Wednesday. The F. is important.
MAY 8, 2025 • BALTIMORESUN.COM
Dealt to Baltimore The Mariners traded Castillo to the Orioles on Wednesday in exchange for cash.
Impact Castillo was designated for assignment Tuesday to make room on the Mariners' roster for Leody Taveras. Now in the Orioles organization, Castillo will reclaim a spot on the 40-man and presumably report to Triple-A, where he owns a 5.02 ERA and 1.13 WHIP through 14.1 innings on the year.
MAY 8, 2025 • ROTOWIRE
Booted from 40-man roster The Mariners designated Castillo for assignment Tuesday.
Impact The transaction frees up a spot on the 40-man roster for waiver claim Leody Taveras. Castillo has posted a 7.71 ERA, 2.71 WHIP and 5:7 K:BB across seven innings (two starts) this season during his time in the majors.
MAY 6, 2025 • ROTOWIRE
Optioned to Triple-A The Mariners optioned Castillo to Triple-A Tacoma on Thursday.
Impact Castillo's time with the big-league club was less than spectacular, as he'll head back to the minors after giving up seven runs (six earned) over seven total innings alongside a 5:7 K:BB. With George Kirby (shoulder) not expected back until May, the Mariners are again left with an opening in their rotation, and it's currently unclear who will be promoted next to fill the gap.
APRIL 10, 2025 • ROTOWIRE
Control issues in no-decision Castillo didn't factor into the decision Wednesday against the Astros after giving up four runs (three earned) on six hits and five walks in four innings. He struck out three.
Impact Two walks followed by a trio of singles gave the Astros a three-run lead in the second inning. Castillo then allowed another run on an RBI walk by Brendan Rodgers in the third frame, which went unearned due to a throwing error by the right-hander on the previous sequence. Castillo had trouble putting hitters away Wednesday, needing 100 pitches to finish the outing, and he holds an uninspiring 7.71 ERA, 2.71 WHIP and 5:7 K:BB across seven innings (two starts) this season.
APRIL 10, 2025 • ROTOWIRE

Arozarena hits grand slam in 8th and draws winning walk in 9th as Mariners rally past Astros 7-6

Randy Arozarena hit a grand slam in the eighth and drew the game-winning walk in the ninth as the Seattle Mariners rallied for seven runs over the final two innings to beat the Hou...
APRIL 10, 2025 • Associated Press
Drawing another start Castillo is scheduled to make his next start Wednesday versus the Astros in Seattle, Matt Kawahara of the Houston Chronicle reports.
Impact Castillo made his Seattle debut and his first MLB start in San Francisco on Friday, when he struck out two and allowed three runs on six hits and six hits over three innings in a no-decision. While not overly impressive, Castillo's performance was good enough to earn him another turn through the rotation, but he likely won't be in store for an extended stay with Seattle. As soon as George Kirby (shoulder) completes a rehab assignment and is deemed ready to make his MLB debut, Castillo will be the odd man out of the rotation, barring injuries to any of Seattle's other four starters.
APRIL 6, 2025 • ROTOWIRE
Drawing another start Castillo is scheduled to make his next start Wednesday versus the Astros in Seattle, Matt Kawahara of the Houston Chronicle reports.
Impact Castillo made his Seattle debut and his first MLB start in San Francisco on Friday, when he struck out two and allowed three runs on six hits and six hits over three innings in a no-decision. While not overly impressive, Castillo's performance was good enough to earn him another turn through the rotation, but he likely won't be in store for an extended stay with Seattle. As soon as George Kirby (shoulder) completes a rehab assignment and is deemed ready to make his MLB debut, Castillo will be the odd man out of the rotation, barring injuries to any of Seattle's other four starters.
APRIL 6, 2025 • ROTOWIRE
Inefficient in first start Castillo allowed three runs on six hits and two walks while striking out two over three innings, taking a no-decision in Friday's extra-innings loss to the Giants.
Impact Castillo's first major-league start was nothing to write home about. He allowed an RBI single to Matt Chapman in the first inning and a two-run double to LaMonte Wade in the second. Castillo finished with 39 strikes on 68 pitches and forced the Mariners to dip into their bullpen early, with all eight relievers getting action in this contest. Castillo's only other major-league experience came in 2022 with the Tigers, when he threw 3.2 innings scoreless innings of relief. The fifth spot in the Mariners' rotation remains unsettled until George Kirby (shoulder) is ready for his season debut, but if Castillo gets another turn, he's lined up to face the Astros next week.
APRIL 5, 2025 • ROTOWIRE
Contract selected for start The Mariners selected Castillo's contract from Triple-A Tacoma, and he's scheduled to start Friday against the Giants.
Impact The right-hander allowed one run over 5.2 innings during his lone start for Tacoma this year and will now get a look in the big-league rotation. Castillo's only major-league experience came with Detroit in 2022, when he delivered a 4:0 K:BB over 3.2 scoreless frames in three appearances. He spent the 2023 and 2024 campaigns pitching in Japan and had a 3.01 ERA across 143.1 innings before inking a minor-league deal with Seattle during the offseason.
APRIL 4, 2025 • ROTOWIRE
Expected to start Friday Castillo is expected to be promoted from Triple-A Tacoma to start against the Giants on Friday, Adam Jude of The Seattle Times reports.
Impact Not to be confused with the Luis Castillo already in Seattle's big-league rotation, the 30-year-old righty made his MLB debut with the Tigers last season and threw 3.2 shutout frames while striking out four batters across three appearances. He's now slated to make his first start in the majors, and a strong showing could buy him another turn through the rotation while the Mariners await George Kirby's (shoulder) return from the IL.
APRIL 3, 2025 • ROTOWIRE
Inaugural Marlins HOF induction an 'emotional' moment for 'Mr. Marlin' MIAMI -- “Where legends come to life.” Jeff Conine aka “Mr. Marlin” was immortalized as the inaugural member of the Marlins Legends Hall of...
MARCH 30, 2025 • MLB.COM
Sent out of big-league camp The Mariners reassigned Castillo to minor-league camp Monday.
Impact After spending the past two seasons in Japan's Nippon Professional Baseball, Castillo returned stateside over the winter, joining the Mariners on a minor-league deal that included an invitation to spring training. The 30-year-old didn't mount much of a case for a spot in Seattle's Opening Day bullpen, giving up three earned runs on nine hits and two walks while striking out five over five innings across his three Cactus League appearances. Castillo is expected to report to Triple-A Tacoma to begin the 2025 season.
MARCH 10, 2025 • ROTOWIRE
Nets NRI deal from Seattle The Mariners signed Castillo to a minor-league contract Tuesday that includes an invitation to spring training, Jon Heyman of the New York Post reports.
Impact Not to be confused with the other Castillo of the same name, this Castillo spent the previous two seasons in Japan pitching for the Chiba Lotte Marines and then Orix Buffaloes. The reliever made three appearances with the Tigers in 2022, tossing 3.2 scoreless innings.
JANUARY 28, 2025 • ROTOWIRE
Luis Castillo, M's edge Rays 1-0 in pitchers' duel Luis Castillo struck out eight in six innings and Mike Ford delivered an RBI single in the Seattle Mariners’ 1-0 win over the Tampa Bay Rays...
SEPTEMBER 8, 2023 • KANSASCITY.COM
Mariners can't capitalize as Castillo keeps Rangers at bay ARLINGTON -- Luis Castillo was dominant once again with seven innings of one-run ball and six strikeouts, but the Mariners were unable to ca...
JUNE 3, 2023 • MLB.COM
'Back on a roll': Castillo quiets Bucs with 10-K scoreless gem SEATTLE -- Luis Castillo seemed to take Friday night’s home-run barrage personally. One day after Pittsburgh scorched Seattle pitchers for 1...
MAY 28, 2023 • MLB.COM
Breaking down Castillo's early May slump BOSTON -- The curious case of Luis Castillo continued on Tuesday in perhaps his most puzzling start yet since joining the Mariners ahead of...
MAY 17, 2023 • MLB.COM
Mariners' Luis Castillo 'electric' in flirting with perfecto in win over Rockies Castillo, who carried a perfect game into the seventh inning, was that good Sunday.
APRIL 17, 2023 • THEATHLETIC.COM
Mariners' Teoscar Hernández goes deep twice, upstages teammate Luis Castillo Seven different Mariners had hits in the 11-2 win against the Angels. "We needed a night like tonight," Seattle manager Scott Servais said.
APRIL 5, 2023 • THEATHLETIC.COM
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