The Yankees optioned De Los Santos to Triple-A Scranton/Wilkes-Barre on Sunday.

The right-hander pitched the first two games of the series versus the Dodgers and will be sent down Sunday in favor of a fresh bullpen arm. De Los Santos has given up just four earned runs across 12 innings with the Yankees this season, but his 1.92 WHIP and 9:6 K:BB provide a less optimistic outlook.

Cousins (forearm/pectoral) is expected to begin a rehab assignment Tuesday, Gary Phillips of the New York Daily News reports.

Cousins has been on the shelf for the entirety of the 2025 season after suffering a forearm strain in February. The right-hander was on the cusp of returning to action in mid-May, but he sustained a pectoral injury, which slowed his progress. Considering the amount of time Cousins has missed, he'll likely require a handful of appearances on his rehab assignment, and it's currently unclear what level of the Yankees' minor-league system he'll report to.

Baker earned the save in Sunday's 3-2 win over the White Sox, striking out two in a perfect ninth inning.

With both Felix Bautista and Seranthony Dominguez seemingly unavailable, Baker was tasked with protecting a one-run lead in the ninth inning Sunday. The right-hander made quick work of the White Sox, needing just 13 pitches to pick up his first save this season. The 30-year-old Baker has been solid in a setup role this year, posting a 2.77 ERA with a 0.92 WHIP and 33 strikeouts across 26 innings.

Chapman earned the save in Sunday's 3-1 win over Atlanta, logging a strikeout and a walk in a scoreless ninth inning.

Chapman has allowed just one run while striking out 10 in his last eight innings, and he improved to 9-for-10 in save chances this season. Overall, the 37-year-old southpaw sports a 1.88 ERA with a 1.00 WHIP and 32:9 K:BB across 24 innings this year.

The Rangers selected Heuer's contract from Triple-A Round Rock on Sunday, Shawn McFarland of The Dallas Morning News reports.

Heuer will receive his first look in the big leagues since 2021 after posting a 3.27 ERA, 1.32 WHIP and 25:11 K:BB across 22 innings with Round Rock. The right-hander will provide the Rangers with some bullpen depth while Nathan Eovaldi (triceps) heads to the injured list.

The Blue Jays reinstated Swanson (forearm) from the 60-day injured list Sunday.

The right-hander has been sidelined for the first couple months of the season due to carpal tunnel syndrome in his right forearm, but he's ready to rejoin the Blue Jays after a six-outing rehab assignment with Triple-A Buffalo. Swanson had a 5.03 ERA across 45 appearances last season, but he recorded four saves and 29 holds with a 2.97 ERA during the regular season in 2023 and could return to a high-leverage role if he can regain that form.

The Red Sox placed Slaten on the 15-day injured list Sunday due to right shoulder inflammation.

According to Chris Cotillo of MassLive.com, Slaten experienced some fatigue after his most recent appearance in Milwaukee on Wednesday, when he took the loss and a blown save after giving up two unearned runs in one-third of an inning. The right-hander will be eligible to be reinstated June 13, and he could be ready to rejoin the Red Sox at that point since his injury doesn't appear to be overly serious.

The Red Sox recalled Guerrero from Triple-A Worcester on Sunday.

He'll be joining the bullpen as a replacement for right-hander Justin Slaten (shoulder), who was placed on the 15-day injured list in a corresponding move. Guerrero had two stints with the big club earlier this season, making four relief appearances while logging a 1.69 ERA and 1.13 WHIP over 5.1 innings. Expect the Red Sox to use him primarily in lower-leverage spots.

Brieske (1-2) allowed one run on two hits across an inning of relief to take the loss Saturday against the Royals,

Detroit starter Tarik Skubal logged seven scoreless innings but the Tigers were blanked on the day, which left Brieske with the loss when he allowed a run in the eighth. After compiling a 3.59 ERA and 69 strikeouts across 67.2 regular-season innings last year, the righty has been less effective in 2025 when healthy with a 4.95 ERA and 14 strikeouts across 20 innings. Brieske's 95.8 mph average fastball velocity is the same as 2024 however, so his stuff isn't noticeably different despite the dip in strikeout rate. Expect the 27-year-old to continue getting opportunities to rediscover his prior form.

Thornton (abdomen) started a minor-league rehab assignment with Triple-A Tacoma on Friday, MLB.com reports.

Thornton, who is recovering from appendicitis, tossed 16 pitches and fanned two in a scoreless inning Friday. The 31-year-old veteran right-hander has been on the injured list since May 9, but he's now tracking toward a return to Seattle's bullpen sometime around the first or second week of June. Thornton has a 5.87 ERA, 1.30 WHIP and 11:4 K:BB over 15.1 innings this season, and he'll likely work as a middle reliever once he rejoins the Mariners.