Manager Alex Cora said Jansen tweaked his lower back during Wednesday's game against the Mariners, Mac Cerullo of the Boston Herald reports.

Jansen appeared to be hurting on the mound during the ninth frame of Wednesday's win, though he remained in the game and finished the inning after Boston's training staff checked on him. He'll get an extra day to rest during the Red Sox's day off Thursday, and he'll be re-evaluated before Friday's game against Texas.

Santos exited Wednesday's game versus the Red Sox due to a bicep injury, Daniel Kramer of MLB.com reports. He retired the only two batters he faced before leaving the game.

While Santos didn't suffer another injury to his right knee Wednesday, his arm issue could send him to the shelf. He will undergo an MRI on Thursday to determine the severity of his injury.

Santos was removed from Wednesday's game versus Boston due to an apparent injury, Daniel Kramer of MLB.com reports.

Santos was removed from his appearance last Wednesday due to a right knee injury, though it's unclear if his early exit against the Red Sox was due to a similar issue. If the right-hander's knee is once again bothering him, the Mariners may opt to place him on the injured list this time around.

The Yankees optioned Marinaccio to Triple-A Scranton/Wilkes-Barre on Wednesday.

Called up from Triple-A earlier in the day, Marinaccio went unused out of the bullpen in the Yankees' 6-5 win over the Phillies. He'll now head back to Triple-A as the Yankees look to open up a spot on the 26-man active roster for trade-deadline pickup Enyel De Los Santos ahead of their next game Friday versus the Blue Jays.

Holmes earned the save in Wednesday's 6-5 win over the Phillies, working around one hit in a scoreless ninth inning.

Protecting a one-run lead, it looked like Holmes could be in trouble again after Kyle Schwarber led off the ninth with a single. However, he would get Austin Hays to fly out before coaxing a game-ending, double-play ball off the bat of Bryce Harper. The 31-year-old Holmes had blown three straight save opportunities prior to Wednesday, including a 26-pitch appearance Tuesday. Despite his recent inconsistency, Holmes still sports a solid 2.82 ERA with a 1.34 WHIP and 45:12 K:BB across 44.2 innings this season while converting 22 of 30 save chances.

The Astros optioned Martinez to Triple-A Sugar Land on Wednesday, Brian McTaggart of MLB.com reports.

Martinez is one of the casualties as the Astros officially add trade acquisitions Yusei Kikuchi and Caleb Ferguson to the 26-man active roster. He holds a 2.92 ERA but an ugly 34:18 K:BB over 49.1 innings with the Astros this season.

The Astros designated Montero for assignment Wednesday.

Montero is in the second year of a three-year, $34.5 million contract, and the Astros appear willing to absorb what remains on that deal. The veteran reliever made 41 appearances for Houston this season, posting a 4.70 ERA and 23:19 K:BB over 38.1 innings. Montero will likely pass through waivers unclaimed and will have the ability to elect free agency.

The Red Sox designated Ramirez for assignment Wednesday, Ian Browne of MLB.com reports.

Ramirez was claimed off waivers Sunday and gave up three runs (two earned) over 1.1 innings in Tuesday's loss to the Mariners in his lone appearance for the Red Sox. He's already made appearances with four different teams at the big-league level this season.

Martin (elbow) threw a successful 25-pitch bullpen session Wednesday and is slated to throw off a mound again in the coming days, Jen McCaffrey of The Athletic reports.

As long as he comes out of the next bullpen session with no concerns, Martin is expected to be cleared to start a rehab assignment next week. He's been out since early July with right elbow inflammation but looks to be progressing toward a return in early or mid-August.

Hendriks (elbow) is headed to Texas to meet with his surgeon and hopes to be cleared to face hitters, Jen McCaffrey of The Athletic reports.

Hendriks has been throwing two bullpen sessions per week over the last month as he works his way back from Tommy John surgery. In his most recent session Tuesday, he threw 35 pitches and used his full repertoire. There's no clear timetable for Hendriks' return to the active roster yet, but he wouldn't appear too far off from a rehab assignment if things continue trending in a positive direction.