The Colorado Rockies have signed relief pitcher Diego Castillo to a minor-league deal with an invite to spring training. This isn't a blockbuster move, but Castillo has been an under-the-radar pitcher throughout his career. He didn't see much action in the MLB last season as he posted a 2.70 ERA, 1.60 WHIP, and 6/8 K/BB ratio in seven appearances with the Minnesota Twins. The 30-year-old has a 3.20 ERA across seven big league seasons and has 35 saves across his career. He has a decent shot at making the big league bullpen considering the Rockies don't have many lock-down options in their pen right now.

The Minnesota Twins recalled right-hander Diego Castillo from Triple-A St. Paul on Tuesday and transferred reliever Justin Topa (knee) to the 60-day injured list in a corresponding move to make room for Castillo on the 40-man roster. Castillo is a veteran of six major-league seasons with the Tampa Bay Rays and Seattle Mariners. He's a sinker-slider reliever with mid-90s velocity, a 3.22 ERA and 304 strikeouts in 268 career MLB innings. The 30-year-old earned the call-up to the big leagues by posting a 2.50 ERA, a 1.06 WHIP, five saves and 22 strikeouts in 18 relief innings for St. Paul. The Dominican reliever has 35 saves in his six major-league seasons and will give the Twins some veteran setup depth in the later innings moving forward.

The Texas Rangers signed free-agent right-handers Diego Castillo, Jesus Tinoco and Gerardo Carrillo, outfielders Sandro Fabian, Elier Hernandez and Derek Hill, and catcher Andrew Knapp to minor-league deals with invitations to major-league spring training on Wednesday. Castillo, 29, allowed six earned runs in just 8 2/3 relief innings for the Seattle Mariners this year, but he saved a career-high 16 games in 2021 with the M's and Tampa Bay Rays and will give the Rangers some experienced relief depth entering the 2024 campaign. Knapp, 32, has spent parts of six seasons in the big leagues with four different teams and has slashed .209/.310/.313 with 13 home runs and 66 RBI in 325 games. The switch-hitting backstop hit .233 (73-for-313) with nine home runs and 29 RBI in 93 games with Triple-A Sugar Land and Triple-A Toledo with the Astros and Tigers, respectively.

Seattle Mariners reliever Diego Castillo has been optioned to Triple-A Tacoma. Castillo has struggled, as have most of the Mariners, so this shouldn't come as too much of a shock. The 29-year-old right-hander posted a rough 6.23 ERA, 1.62 WHIP, and 7:7 K/BB ratio over 8 2/3 innings out of the bullpen so far this year. His services will likely be called upon again soon with the big league club so he shouldn't be in the minors for too long.

Seattle Mariners relief pitcher Diego Castillo lost his salary arbitration case against the team on Wednesday, according to a source. Castillo will make $2.95 million in 2023, instead of the $3.225 million he filed for. In his first full season with the Mariners in 2022, Castillo went 7-3 with a 3.64 ERA (3.68 FIP), 1.14 WHIP, seven saves, 22 walks and 53 strikeouts in 54 1/3 relief innings over 59 appearances out of the bullpen. The 29-year-old right-hander could see a handful of save chances again in 2023, but he'll mostly be serving as a late-inning setup man in Seattle's bullpen alongside Andres Munoz. Paul Sewald is coming off injury, but he's projected to begin the year as the M's primary closer.

Seattle Mariners relief pitcher Diego Castillo (shoulder) threw a bullpen session on Friday when the team opened their homestand against the Los Angeles Angels, and his shoulder is "feeling much better," according to skipper Scott Servais. Castillo will likely throw another bullpen session before returning from the injured list. The 28-year-old was always likely to return after missing the minimum 15 days on the injured list after landing there with right shoulder inflammation. Andres Munoz and Matt Festa have seen increased work at the back end of the bullpen with Castillo sidelined ahead of closer Paul Sewald. Castillo will return to a 3.93 ERA, 1.31 WHIP, six saves and 36 strikeouts in 36 2/3 relief innings for Seattle.

The Seattle Mariners placed relief pitcher Diego Castillo (shoulder) on the 15-day injured list on Thursday with right shoulder inflammation and recalled right-hander Matt Brash from Triple-A Tacoma in a corresponding move. Castillo's injured-list placement is retroactive to July 26. On the season, the 28-year-old Dominican has gone 7-1 with a 3.93 ERA, 1.31 WHIP, six saves, four holds, 36 strikeouts and 17 walks in 36 2/3 innings in his second season with Seattle, mainly in a late-inning setup role in front of closer Paul Sewald. Andres Munoz and Matt Festa will see more late-inning work with Castillo on the sidelines for at least the next two weeks. In Castillo's last outing on Monday against the Texas Rangers, he allowed a solo home run while walking one and striking out one in one-third of an inning to pick up his fourth hold.

Seattle Mariners reliever Diego Castillo worked a scoreless ninth inning on Thursday to close out his team's 6-5 comeback win over the Rangers. With Paul Sewald picking up two saves during Wednesday's doubleheader, it was Castillo who got the call to close out his sixth game of the year in this one. The right-hander promptly retired the first two batters he faced on a groundout and a strikeout, but would allow Marcus Semien to reach second base after he took a comebacker off his hip and then recklessly threw the ball into left field. Castillo went on to intentionally walk Corey Seager before getting Adolis Garcia to fly out and end the game. Sewald is the clear favorite for saves in the M's pen, but Castillo will continue to pick up the scraps whenever he needs a night off.

Seattle Mariners relief pitcher Diego Castillo picked up his third save of the season in Monday's 7-4 win over the Astros. Castillo entered to pitch the ninth inning with a three-run lead. He got the first two outs on a ground out and line out, walked a batter, and then got the final out on another ground out. The 28-year-old has converted all three of his save opportunities this season and has a 3-0 record, but he also has a 5.85 ERA and 4.05 BB/9 rate over 20 innings pitched. The Mariners have not had a clear approach to saves this season, and Castillo's poor overall performance limits his fantasy value at this time, even in deep roto leagues.

Seattle Mariners relief pitcher Diego Castillo earned his second save of the season against the New York Mets on Sunday. Right-hander Drew Steckenrider came in the begin the ninth, but allowed four hits and two runs. The Mariners handed over the ball to Castillo who recorded the final two outs of the game. In May, Castillo has allowed nine runs in three outings. That being said, he's a risky option even if he's given more chances in the ninth inning. At the moment, Paul Sewald appears to be the favorite to get the ball in the ninth inning.

Seattle Mariners pitcher Diego Castillo struck out two over a perfect inning to earn the save in Saturday's 4-3 win over the Minnesota Twins. Mariners manager Scott Servais went to Drew Streckenrider for the save opportunity in the first game of the series but decided to roll with Castillo on Saturday. The 28-year-old was Seattle's primary setup man after being traded from the Rays to the Mariners during last year's trade deadline. He has closer experience and converted 16-of-22 saves for the Rays/Mariners in 2021. Based on the first two games, Seattle might use a closer-by-committee approach the rest of the way, but it remains to be seen. Fantasy managers desperate for saves should look to add Castillo off the waiver wire.

Seattle Mariners relief pitcher Diego Castillo earned the win in relief Wednesday, improving his record to 3-5 for the year. He faced four Houston Astros, allowing one hit and striking out three in an inning of work. Castillo now has three consecutive scoreless appearances with five strikeouts since returning from the injured list. He's not the primary closer in Seattle, but in leagues that value holds he is worth an add with his 2.77 ERA, 0.97 WHIP, and 62 strikeouts in 48 2/3 innings.

Seattle Mariners relief pitcher Diego Castillo (shoulder) was placed on the 10-day injured list on Saturday with right shoulder inflammation, according to Ryan Divish of the Seattle Times. Castillo had just blown a save opportunity in his last outing on Thursday, allowing two runs on one hit and one walk while striking out two over one inning of work. Over 10 appearances with Seattle since being acquired from Tampa Bay, Castillo has gone 0-1 with one save, a 3.86 ERA, 0.857 WHIP and 22.2 percent strikeout rate over 9 1/3 innings of work. To replace Castillo on the active roster, the Mariners recalled relief pitcher Robert Dugger from Triple-A Tacoma. At this point, Castillo only has value in SV/HLD formats, and in those leagues he should be stashed on the IL for now.

Seattle Mariners relief pitcher Diego Castillo blew a save Thursday night against the Texas Rangers. Seattle took a five-run lead into the ninth inning, but fellow reliever Anthony Misiewicz allowed three runs without recording an out, and then Castillo came on to complete the meltdown, allowing two runs on one hit and one walk. He struck out two batters. Castillo was already filling a set-up capacity most of the time for Seattle, and this won't help him cut into Paul Sewald's closer role. Castillo is only rosterable in holds leagues.

Seattle Mariners relief pitcher Diego Castillo earned his fifth hold of the season Tuesday, allowing one hit and striking out one batter in his inning of work against the Texas Rangers. It was a solid outing for Castillo, but fantasy managers will be quick to note that Castillo pitched the eighth inning, setting up for apparent closer Paul Sewald. Castillo has been excellent since coming over from Tampa Bay, but it appears that he will not be the primary option for saves, having collected just one in his Seattle tenure. He's droppable in leagues that don't reward holds.

Seattle Mariners relief pitcher Diego Castillo turned in another scoreless performance Friday night, getting four outs against the Toronto Blue Jays, walking one and striking out one. Castillo has now allowed just one hit in eight appearances since being acquired from the Tampa Bay Rays, though he also has just one save in two opportunities. Castillo has largely been used in the seventh and eighth innings, leaving the ninth to Paul Sewald and Drew Steckenrider. Fantasy managers may want to look elsewhere for saves if they can.

Seattle Mariners relief pitcher Diego Castillo is the clear primary closing option for the Mariners, but that doesn't mean he'll consistently get the ninth inning. After throwing the eighth on Friday, Castillo once again pitched Saturday, but this time in the seventh inning. He struck out two and did not allow a baserunner. Much like with Kendall Graveman before him, Castillo will be used in the highest leverage situations. That will leave Paul Sewald with some stray save opportunities, but Castillo is still the guy to add in most formats.

Seattle Mariners relief pitcher Diego Castillo pitched against the Tampa Bay Rays for the first time since being traded away Tuesday, and he walked one and struck out one in an inning of work en route to his 15th save of the season. Castillo has enjoyed an excellent year, with a 2.82 ERA, 0.99 WHIP, and 50 strikeouts in 38 1/3 innings. With Paul Sewald entering before Castillo in the eighth inning, Castillo appears to be the locked-in closer for Seattle. That affords him plenty of fantasy value as the Mariners (and fantasy managers) seek to secure their position in the playoffs.

Seattle Mariners relief pitcher Diego Castillo came on in the bottom of the 10th inning with a chance for his first save as a member of the Mariners Saturday, but instead he allowed a two-run home run to Jonah Heim that left him with a blown save and a loss. He did not record an out. It's his third blown save in 17 opportunities this season. Castillo has been quite good this year, with a 2.89 ERA and 0.99 WHIP in 39 games, but his value does take a hit coming over from Tampa Bay. He's in no danger of losing his job, however.

Seattle Mariners reliever Diego Castillo threw a perfect ninth inning in the 9-5 victory against the Texas Rangers. It was Castillo's first appearance with the Mariners after being acquired in a trade with the Tampa Bay Rays on Thursday. The Mariners dealt closer Kendall Graveman on July 27, meaning Castillo should be the clear closer in Seattle. Castillo's been good this year, posting a 2.65 ERA with 14 saves in 16 chances. Fantasy managers should continue to roster and start Castillo with him possibly getting more save opportunities.