The Diamondbacks recalled Castellanos from Triple-A Reno on Wednesday, Alex Weiner of ArizonaSports.com reports.

Castellanos was just optioned to Reno on Tuesday but is back to serve as the 27th man during Wednesday's doubleheader in Cleveland. He will likely be sent back down again following Wednesday's twin bill.

Atlanta manager Brian Snitker said Tuesday that Holmes will remain in the rotation as the club's No. 5 starter in the wake of Reynaldo Lopez (forearm) landing on the injured list, Lindsay Crosby of AthlonSports.com reports.

Though Lopez hadn't pitched since July 28, Atlanta had been holding out hope for a little over a week that the right-hander would avoid a stint on the IL before he was finally deactivated Monday. Holmes had already made starts in his last two appearances while Max Fried (forearm) was on the shelf, and though Fried has since been activated, Lopez's absence will extend Holmes' run in the rotation. Since receiving his first MLB call-up in mid-June, Holmes has compiled a 3.00 ERA, 1.00 WHIP and 33:6 K:BB in 33 innings over 12 appearances. Despite his quality numbers between the bullpen and rotation, Holmes doesn't profile as an appealing streaming option for his next start, which is expected to fall this weekend against the Rockies at hitter-friendly Coors Field.

Garrett (elbow) allowed one hit and one walk but struck out three over a scoreless inning in his first rehab appearance with Triple-A Syracuse on Tuesday.

Garrett has been shelved for the past four weeks with right elbow inflammation but shouldn't need many, if any, more rehab outings before being activated from the 15-day injured list. The righty reliever has contributed a 3.64 ERA and 63:22 K:BB across 42 frames out of the Mets' bullpen in 2024.

The Cubs signed Houser to a minor-league contract Tuesday.

Houser was cut loose by the Mets in late July after putting up a 5.84 ERA and 45:32 K:BB over 69.1 innings covering seven starts and 16 relief appearances. He will join the rotation at Triple-A Iowa, where he'll provide the Cubs with some veteran starting pitching depth.

Graterol was diagnosed with a Grade 3 right hamstring strain after being removed from his appearance in Tuesday's 6-2 loss to the Phillies, Fabian Ardaya of The Athletic reports.

Graterol made his season debut Tuesday after missing the first four months with a shoulder injury. Though manager Dave Roberts stopped short of ruling Graterol out for the season when asked about the reliever's injury following the game, Ardaya relays that the chances of Graterol pitching again in 2024 are "slim." Graterol posted a 1.20 ERA and recorded seven saves in 2023 for the Dodgers.

Helsley gave up a run on two hits and a walk in the ninth inning Tuesday to record his 35th save of the season in a 4-3 win over the Rays. He struck out one.

The right-hander came dangerously close to blowing his fourth save chance of the year, putting the first two batters he faced aboard before Jonny DeLuca poked a two-out single to left field, but Helsley was able to get Taylor Walls to ground out to end the game. The Cards' closer has been tagged for four runs in his last three appearances, but on the season he still sports a 2.77 ERA, 1.23 WHIP and 55:20 K:BB through 48.2 innings. Helsley's 35 saves lead the majors, two ahead of the Guardians' Emmanuel Clase.

Vodnik allowed a hit in a scoreless inning to earn the save in Tuesday's 6-3 win over the Mets. He did not strike out or walk a batter.

Vodnik has a save in each of the last two outings, and he's logged three of the Rockies' last four saves. This was also his fifth scoreless outing in a row, a span in which he's allowed two hits and two walks while striking out four over five innings. For the season, Vodnik has six saves, six holds, a 3.64 ERA, 1.37 WHIP and 53:25 K:BB through 59.1 innings. While he's not fully clear from being part of a closer committee, Vodnik appears to be a slight favorite for saves over Tyler Kinley, who earned a hold with a perfect eighth inning Tuesday.

Graterol was removed from Tuesday's game against the Phillies with a right hamstring strain.

Graterol was grabbing at his right hamstring and had to be helped off the field by a trainer after throwing just eight pitches in the sixth inning of Tuesday's contest. The 25-year-old had been making his season debut after sitting out the first four months of the season due to a shoulder injury, and he'll now presumably undergo testing to determine how much more time -- if any -- he'll have to miss.

The Rockies promoted Sullivan from High-A Spokane to Double-A Hartford on Saturday.

Sullivan made his Double-A debut later that day, working four scoreless innings and striking out two while allowing three hits and one walk. The left-hander was bumped up to Double-A after turning in two straight five-inning, 10-strikeout performances to end his time at High-A. Sullivan forged a 2.16 ERA, 0.84 WHIP and 101:8 K:BB in 83.1 innings with Spokane.

The Rockies selected Shreve's contract from Triple-A Albuquerque on Tuesday.

Shreve was just inked to a minor-league deal Sunday and is now in the majors two days later. The veteran left-hander has been at the Triple-A level all season, posting a 2.62 ERA and 35:12 K:BB over 34.1 innings across three different organizations.