Seattle Mariners starting pitcherLuis Castillo(4-6) picked up the loss Thursday, allowing two runs on seven hits with three walks and one hit-by-pitch in five innings in a 5-0 loss to the New York Yankees. Castillo's only mistakes were two solo shots byGiancarlo StantonandAaron Judge, and the two runs were the only ones the Yankees needed asLuis Gilout-dueled the veteran right-hander. Castillo has put up excellent numbers since being traded over from the Cincinnati Reds and continues to do so this year while headlining a stacked Seattle rotation. Overall, the 31-year-old owns a 3.31 ERA, 1.21 WHIP, and a 69:18 K: BB across 65 1/3 innings.After a rocky start to the season, allowing four runs in each of his first three starts, Castillo has not allowed more than two runs in eight straight starts. He will look to continue that streak against the Houston Astros on Tuesday.

Seattle Mariners starting pitching prospect Matt Tabor was promoted to Triple-A Tacoma on Thursday. Tabor underwent surgery to remove blood clots in 2022 and Tommy John surgery in 2023, which has sidelined him for the better part of almost three seasons. He pitched just three innings in the Rookie League this spring before getting the call to join Triple-A. The 25-year-old's last full season was in 2021 where he posted a 5.87 ERA, 1.32 WHIP, and 39:96 BB:K ratio across High, Double, and Triple-A. The right-hander will hope to settle in at Triple-A this summer after struggling in 2021 with an 11.13 ERA across 32 innings. The former third-round pick should remain on all waiver wires but could become an interesting name in dynasty leagues if he can perform well at Triple-A after his three-year absence.

Baltimore Orioles infield prospect Jackson Holliday entered Thursday with a poor .200/.398/.329 line through May. On Thursday, he launched his fifth home run of the season and might be settling back into Triple-A. Holliday was excellent through the opening month, with Triple-A Norfolk posting a .310/.473/.500 line, which earned him a promotion to the major leagues. However, in his ten major league games, the top prospect in baseball struggled and only tallied two hits through ten games, which resulted in his demotion. Since returning to Triple-A, the 20-year-old has yet to find any consistency but will look to build off the home run he hit on Friday. Holliday remains a must-stash player in standard leagues, as he should be back in Baltimore fairly soon and should be expected to make an immediate impact when he does return.

Baltimore Orioles outfield prospect Heston Kjerstad extended his impressive multi-hit hitting streak to three games on Thursday with a three-hit performance in addition to hitting his 13th home run of the season. Kjerstad has been outstanding with Triple-A Norfolk this season, riding an overall .347/.427/.754 line with 44 RBI. The 25-year-old earned a promotion to the major leagues on April 23 but did not receive consistent playing time and was eventually sent back down to the minor leagues to further his development on May 13. Since his return to Triple-A, Kjerstad has posted a .344/.415/.781 line with three home runs. The number four prospect in the Baltimore system is clearly ready for the major leagues but does not have a spot to fill in the Baltimore lineup. For now, he will continue to dominate Triple-A but could be the first name called if needed to replace an injured player making him a solid stash option in most leagues.

Los Angeles Dodgers catching prospect Dalton Rushing ended his 13-game home run drought on Thursday with a three-run shot to power Double-A Tulsa to a victory. Rushing was swinging a hot bat through April with a strong .278/.394/.556 line with three long balls and a 9:14 BB:K ratio. However, entering Thursday, he has been in a bit of a slump with a .213/.362/.319 line through the start of May. Rushing is considered to be the number two prospect in the Los Angeles system, behind only Andy Pages, who is already in the major leagues. Rushing is expected to make his major league debut sometime in 2025 but could push for a late-season promotion to Triple-A. He remains a name to monitor in dynasty leagues as he could continue to develop into one of the game's top-catching prospects.