The Orioles recalled Hiraldo from Triple-A Norfolk on Saturday.

Hiraldo pitched 1.1 scoreless innings during his MLB debut May 27, but he's turned in a 5.75 ERA and 1.18 WHIP through 20.1 frames in Triple-A since then. He'll rejoin the Orioles' bullpen nonetheless to provide a fresh relief option, replacing Jeremiah Jackson on the active roster.

Lynch (elbow) will begin a rehab assignment with Double-A Northwest Arkansas on Saturday.

Nerve irritation in Lynch's left elbow landed him on the injured list July 6. Now that he has the green light to return to game action, the left-hander shouldn't require too many tune-up outings before being cleared to rejoin the Kansas City bullpen.

The Yankees reinstated De Los Santos (elbow) from the injured list Saturday.

De Los Santos landed on the injured list in mid-June due to elbow discomfort, but after two rehab outings in the minors, he'll now rejoin the Yankees' bullpen. The 27-year-old carries a 1.80 ERA and a 1.70 WHIP through 20 innings with New York this year and should take on a middle-relief role now that he's healthy.

The Guardians recalled Kent from Triple-A Columbus to serve as the team's 27th man for Saturday's doubleheader versus the Royals.

Kent is likely to stick around with the Guardians just for the day before heading back to Triple-A once the twin bill concludes. The 27-year-old righty has previously made four appearances out of the Cleveland bullpen this season, allowing five earned runs on eight hits and five walks while striking out eight over 7.1 innings.

Bowlan was called up from Triple-A Omaha and will serve as the Royals' 27th man for Saturday's doubleheader against Cleveland.

Bowlan owns a 4.64 ERA and 1.27 WHIP through 21.1 innings with the Royals this season. The 28-year-old will likely be demoted back to Triple-A following Saturday's twin bill.

The Yankees optioned Effross to Triple-A Scranton/Wilkes-Barre on Friday.

Effross was optioned after struggling in Friday's loss to Philadelphia, giving up four runs on four hits with one walk and no strikeouts over one inning. The outing continued a rough start to the second half for the right-hander, who has surrendered eight runs across 4.2 frames since the All-Star break. New York figures to bring up a fresh arm to replace Effross in the bullpen, but that move has not yet been made.

Duran logged a save during the Twins' 1-0 win over the Nationals on Friday after striking out one batter in a perfect ninth.

Duran was brought in to protect the Twins' slim lead and needed just six pitches (five strikes) to dismiss the heart of the Nationals' order, highlighted by his strikeout of James Wood. It was a nice bounceback performance for Duran, who yielded two runs on three hits across two innings in his last outing against the Dodgers on Tuesday. He has a 1.90 ERA, 1.12 WHIP and 52:16 K:BB across 47.1 innings this season.

Sborz (shoulder) had his minor-league rehab assignment transferred from Double-A Frisco to Triple-A Round Rock on Friday.

Sborz is three games into his rehab stint, which began with a one-game cameo with Round Rock before he moved to Frisco for two contests. Altogether, he's tossed 3.1 innings, allowing one run on three hits and compiling a 4:3 K:BB. Sborz underwent right shoulder surgery last November and could make his season debut with Texas before the end of July.

Holman (shoulder) has been shut down from throwing due to a mild strain in his right middle finger, Martin Gallegos of MLB.com reports.

Holman landed on the Athletics' 15-day injured list June 16 due to rotator cuff tendinitis in his right shoulder before being transferred to the 60-day IL in mid-July. He's eligible to be reinstated from the IL in mid-August, though his latest setback will likely delay the 25-year-old's return to the majors.

The Rays designated Waguespack (undisclosed) for assignment Friday.

Waguespack has been on the injured list at Triple-A Durham since June 9, and he'll yield his spot on the 40-man roster Friday as the Rays get Jonny DeLuca (shoulder) back from the 60-day IL. Waguespack logged a 0.46 ERA in 19.2 innings with Durham before sustaining the unspecified injury.