43 Adam Warren RP

Warren was dealt to Seattle in exchange for international bonus pool money on Monday, Ken Rosenthal of The Athletic reports.

The Mariners acquired a second reliever in the span of an hour after trading for Zach Duke from the Twins earlier. Warren has missed some time due to a back injury this year, but has appeared in 24 games for the Yankees nonetheless. Across 30 innings, he's logged a 2.70 ERA and 1.27 WHIP with a 37:12 K:BB, though he has allowed six earned runs in 10 innings of relief this month. Look for him to take on a late-inning role with the Mariners.

Warren (back) was activated from the 10-day disabled list ahead of Game 2 of Monday's doubleheader against the Tigers.

Warren hasn't pitched since April 20 due to a back injury, but he's been cleared to return after getting through three scoreless innings in his final minor-league rehab appearance last week with no issues. He'll take the roster spot of Tommy Kahnle, who was sent to the minors in a corresponding roster move. Prior to landing on the shelf, Warren compiled a 3.24 ERA and 11:4 K:BB across 8.1 innings of relief this season.

Yankees manager Aaron Boone said that Warren (back) could be activated ahead of Monday's doubleheader with the Tigers, Brendan Kuty of NJ.com reports.

Warren was stellar Wednesday in his second rehab outing at Double-A Trenton, striking out three over three scoreless innings while yielding just one hit. Now that he has had a few days to recover from that elongated relief appearance, Warren looks ready to return from the DL, but it's possible the Yankees decide to wait on the transaction since the bullpen hasn't been overworked of late.

Manager Aaron Boone said Warren (back) won't be activated during the Yankees' series against the Orioles over the weekend, Bryan Hoch of MLB.com reports.

Warren allowed just one hit and struck out three across three scoreless innings in his second rehab appearance, this one with Double-A Trenton. While it was a drastic improvement from his first rehab outing, it sounds like the Yankees want him to get one more tuneup in before likely rejoining the big club sometime next week.

Warren (back) made his first rehab appearance Saturday at Triple-A Scranton/Wilkes-Barre. He recorded two outs and gave up four runs on one hit and two walks.

It was unsurprising that Warren showed some rust in his first appearance in affiliated ball in more than a month after a right back strain forced him to the 10-day disabled list April 21. In light of the rough outing, it's expected that Warren will need to make at least one more rehab appearance with the Triple-A club before the Yankees feel comfortable bringing the right-hander back from the DL. Warren will be ticketed for a middle-relief role out of the New York bullpen once activated.