Sewald (shoulder) began a rehab assignment with High-A West Michigan on Thursday, Emily Waldon of Baseball America reports.

Sewald landed on the injured list in mid-July and has been throwing for around a month. Due to his long layoff, he may need to make several rehab appearances before being activated.

Garrett (elbow) began a rehab assignment with Double-A Binghamton on Thursday.

Garrett made his first rehab appearance Thursday and struck out two while allowing one hit across one inning. He has only been sidelined since Aug. 25, so Garrett should be able to return after a couple outings in the minors.

Jax will serve as the Rays' opening pitcher in Friday's game against the Guardians, Marc Topkin of the Tampa Bay Times reports.

Jax has worked primarily in high-leverage spots all season, and that has continued since he joined the Rays at the trade deadline. However, he's struggled to a 7.20 ERA and 1.80 WHIP across 10 innings with Tampa Bay, so working as an opener could prove to be a bit of a reset for the right-hander. Jax will likely only work an inning or two before giving way to Ian Seymour, who is expected to work in bulk relief.

Holderman secured the save Thursday against the Dodgers, allowing one hit and striking out one in two-thirds of an inning.

It's possible that primary closer Dennis Santana was unavailable after working each of the past two days for the Pirates, which opened the door for Holderman to collect his first save of the year and the third of his career. However, Holderman shouldn't be expected to see many more save chances down the stretch. Over 22.1 innings, the right-hander has a 7.66 ERA, 1.93 WHIP and 15:14 K:BB with two holds.

Duran secured the save Thursday against Milwaukee, striking out one in a clean ninth inning.

Duran posted his 26th save of the season and his 10th since landing with the Phillies before the trade deadline. The 27-year-old right-hander now has a 1.54 ERA, 0.86 WHIP and 14:0 K:BB over 11.2 innings for Philadelphia. Duran has submitted a scoreless outing in 12 of his last 14 appearances, and he's locked in as the club's closer.

Estevez allowed a hit and struck out two in a scoreless inning to earn the save in Thursday's 4-3 win over the Angels.

Estevez has allowed just two hits while racking up nine strikeouts during his eight-inning scoreless streak. He's earned seven saves in that span and continues to lead the majors with 37 saves on the year. He's added a 2.54 ERA, 1.06 WHIP and 52:20 K:BB through 60.1 innings this season and is unlikely to be challenged for the closing role during September.

Megill's (elbow) bullpen session went well Thursday, and he is expected to be activated from the injured list by Sept. 16, Adam McCalvy of MLB.com reports.

This marked Megill's first time throwing off of a mound since he hit the injured list Aug. 27. There weren't many other details provided, as the assembled media members were called into manager Pat Murphy's office while Megill was throwing. Regardless, Megill should be back for the final couple weeks of the season, barring a setback.

Martin cleared waivers Thursday and was sent outright to Triple-A Norfolk, Jake Rill of MLB.com reports.

Martin will officially stick in the Orioles organization after being designated for assignment Tuesday. He'll provide the club with organizational bullpen depth at Norfolk, but after putting up a 5.29 ERA and 1.40 WHIP through 32.1 innings in the minors, he's unlikely to get another opportunity with the O's this year.

Headrick (forearm) will begin a rehab assignment Thursday at Triple-A Scranton/Wilkes-Barre.

A bruised forearm has kept Headrick on the injured list since mid-August, but he's now been cleared to begin playing in minor-league games in preparation for his return to the Bronx. The 27-year-old sports a 3.13 ERA and 1.04 WHIP through 23 innings with the Yankees this year and should claim a middle-relief role in their bullpen once healthy.

The Guardians recalled Kent from Triple-A Columbus on Thursday, Tim Stebbins of MLB.com reports.

With Nic Enright (elbow) landing on the injured list, Kent will turn around and rejoin the big-league squad after being demoted to Columbus on Wednesday. The 27-year-old has given up five earned runs through 9.2 innings in the majors this year and will presumably be limited to low-leverage opportunities while with the Guardians.