The Reds returned Gibaut (shoulder) from his rehab assignment Monday, Charlie Goldsmith of Fox 19 Now Cincinnati reports.

Gibaut remains on the 15-day injured list, so he must have encountered a setback while on a rehab assignment with Triple-A Louisville, where he allowed four runs in two-thirds of an inning in his most recent appearance Wednesday. The righty reliever has been out since late June with a right shoulder impingement.

The Red Sox will designate Burdi for assignment Monday, Chris Cotillo of MassLive.com reports.

The transaction will free up a spot on the 40-man roster for the addition of left-hander Jovani Moran, who will be called up from Triple-A Worcester. Burdi has allowed two runs with a 4:3 K:BB over three innings at Worcester since returning from a hip injury. The righty reliever has pitched well this season when healthy, so he could receive interest via trade or waivers.

Diaz (5-2) took the loss Sunday against the Brewers, giving up one run on one hit in one-third of an inning.

The Mets headed into the eighth inning with a 6-5 lead, but Ryan Helsley blew the save and needed to be replaced by Diaz to get the final out of the frame. The team's closer had his own struggles in the ninth however, as Isaac Collins took him deep to walk it off. It was the first earned run Diaz had been tagged with since April 21, but both his losses on the season have come in three August appearances, as he allowed the phantom runner to score in an extra-inning loss to the Giants on Aug. 1. Despite those recent setbacks, the 31-year-old right-hander has a stellar 1.60 ERA, 0.93 WHIP and 67:17 K:BB through 45 innings in 2025, converting 23 of 25 save chances.

Alexander is expected to pitch in bulk relief behind opening pitcher Elvis Peguero in Monday's game against the Tigers, Jack Ankony of SI.com reports.

Alexander made a 3.1-inning start versus the Phillies on July 30, but his last two appearances have come out of the Chicago bullpen. In his most recent outing last Wednesday against the Mariners, Alexander shined in long relief behind starter Jonathan Cannon, striking out five batters while allowing just two baserunners over 4.1 scoreless frames and 67 pitches. With Cannon having since been demoted to Triple-A Charlotte, Alexander will essentially be taking his spot in the rotation Monday, as Peguero is expected to work just one or two innings before Alexander likely steps in and covers multiple frames out of the bullpen.

Triple-A Indianapolis placed Harrington on its 7-day injured list Sunday due to an undisclosed injury.

After being demoted Aug. 2, Harrington rejoined the Indianapolis rotation Friday and apparently sustained an injury during that start. The right-hander possesses a spot on the Pirates' 40-man roster, but his injury coupled with his poor numbers at the Triple-A level this season (5.40 ERA, 1.33 WHIP in 95 innings) could hinder his chances of getting another look in the big-league rotation in 2025.

The Pirates will activate Shugart (knee) from the 15-day injured list before Monday's game in Milwaukee, Alex Stumpf of MLB.com reports.

Shugart has been shelved since early July with left knee inflammation but is ready to go after making three rehab appearances. He will likely fill a middle-relief role.

The Pirates will option Moreta to Triple-A Indianapolis prior to Monday's game in Milwaukee, Alex Stumpf of MLB.com reports.

He'll give up his spot in the bullpen and on the 26-man active roster to Chase Shugart (knee), who will be reinstated from the 15-day injured list. Moreta has pitched well during his five appearances with the Pirates this season, allowing two runs with a 7:1 K:BB over 4.2 innings.

The Cardinals are considering using Leahy as part of piggyback starts down the stretch with Andre Pallante and/or Matthew Liberatore, Derrick Goold of the St. Louis Post-Dispatch reports.

The Cardinals already have plans for Leahy to prepare this offseason to enter spring training as a starting pitcher, and the righty could get a jump-start on that preparation if the team opts to employ him in a piggyback role during the final two months of this season. Manager Oliver Marmol said there are currently no plans for piggyback starts, but it's being discussed as the club seeks to keep the workloads of Pallante and Liberatore in check. Leahy has been used exclusively as a reliever so far at the major-league level, but he'll often pitch multiple innings at a time and has past experience as a starter in the minors.

Keller, who logged 1.1 scoreless innings in Sunday's loss to the Cardinals, has now recorded eight straight scoreless appearances.

Across those eight appearances, Keller has covered 9.1 innings and struck out 11 batters while allowing just one hit and two walks. It's been a great stretch for the veteran righty, who has been solid all season with a 2.63 ERA, 1.05 WHIP and 8.9 K/9 across 51.1 innings out of the Chicago bullpen. Keller is firmly entrenched as one of the Cubs' top setup options ahead of closer Daniel Palencia.

King (oblique) could begin a rehab assignment with Triple-A Memphis as soon as Tuesday, MLB.com reports.

King threw a bullpen session at approximately 70 percent effort last Thursday and was scheduled for a full-effort bullpen session Saturday. As long as he bounces back from those throwing sessions with no issues, he'll be cleared for rehab games. The lefty reliever is first eligible for activation from the 15-day injured list Friday, and he has a good chance to return that day.