Hader threw a scoreless inning and earned a save against the Rays on Monday.

Hader had to deal with the speedy Chandler Simpson on base after he reached via catcher's interference to start the frame. Hader was able to retire the next three batters in order to close out the 4-3 victory. He's now converted each of his 12 save chances this season and lowered his ERA to 1.71 across 21 innings. Monday was Hader's first appearance without recording a strikeout since April 19.

Long is expected to begin a rehab assignment with the Royals' Arizona Complex League team Tuesday.

Long has missed over a month of action while dealing with left elbow inflammation, but he's now set to return to the mound officially. The reliever struggled to a 12.86 ERA and 2.43 WHIP with six strikeouts over seven innings in seven appearances with Kansas City this year, and once healthy, he'll likely return to a low-leverage role in the bullpen.

The Tigers recalled Lee from Triple-A Toledo on Monday, Chris McCosky of The Detroit News reports.

He's taking the roster spot vacated by Reese Olson (finger), who was placed on the 15-day injured list Monday. Lee has permitted only one run with a 9:4 K:BB over nine innings during his multiple stints in the majors this season.

The Angels reinstated Bachman (shoulder) from the 15-day injured list and optioned him to Triple-A Salt Lake on Monday.

Bachman started the season on the IL while he recovered from thoracic outlet syndrome, which prevented him from pitching in any Cactus League games during spring training. He was cleared to begin a rehab assignment at Single-A Inland Empire, with whom he made two one-inning appearances before heading to Triple-A. He's since made three one-inning relief appearances for Salt Lake and looks poised to remain in the Triple-A bullpen after he had been previously been utilized as a starter in the minors since the Angels selected him in the first round of the 2021 First-Year Player Draft.

Kelly (glute) will begin a rehab assignment in the rookie-level Florida Complex League on Tuesday, Ryan Bass of FanDuel Sports Network Sun reports.

Kelly is ready to pitch in games again after missing more than a month of action with a glute strain. He is expected to rejoin the Tampa Bay bullpen before the end of the month.

Astros manager Joe Espada said that Whitley (knee) is "a possibility" to be activated from the 15-day injured list during the team's three-game series with the Rays that begins Monday, Matt Kawahara of the Houston Chronicle reports.

Whitley has made just one appearance with the Astros this season due to a pair of knee injuries, but he looked sharp in two recent rehab appearances with Triple-A Sugar Land, tossing two perfect innings with four strikeouts. Upon activation, the former top prospect is likely to be used in low-leverage relief spots initially.

The Athletics optioned Maldonado to Triple-A Las Vegas on Monday.

The transaction clears a spot on the 26-man active roster for J.T. Ginn (elbow), who will return from the injured list to start Monday's game against the Angels. Maldonado was called up Friday and allowed two runs on three hits while striking out two during his lone one-inning appearance out of the Athletics bullpen. He'll return to Triple-A, where he's posted a 0.73 ERA, 0.66 WHIP and 17:2 K:BB across 12.1 innings.

The Royals activated Clarke from the paternity list Monday.

Clarke missed the weekend series versus the Cardinals while welcoming a new addition to the family, but he's back for the start of a three-game set in San Francisco. The righty has tossed 5.1 scoreless frames with the Royals this season.

Guenther will serve as the Tigers' opening pitcher for Monday's game against the Cardinals, Chris McCosky of The Detroit News reports.

Guenther will draw his first MLB start Monday, though he hasn't covered more than two innings in any of his nine appearances between the big club and the minors this season and is unlikely to work deep into the contest. Keider Montero is slated to cover the bulk of the innings out of the bullpen once Guenther exits the game.

Jackson (hand) issued a walk and struck out a batter in a scoreless inning during Sunday's 4-3 loss to the Astros.

Jackson battled a swollen hand throughout the week after being hit by a comebacker May 12 against the Rockies, but he returned to the mound Sunday in a non-save situation. The right-hander didn't appear to have any lingering issues as he threw 10 of 15 pitches for strikes, and his average fastball velocity of 93.6 mph was only marginally lower than his season average. Shawn Armstrong picked up a pair of saves in his absence, but Jackson should reclaim primary closing duties now that he's healthy.