The Yankees acquired Chivilli from the Rockies on Wednesday in exchange for T.J. Rumfield, Jack Curry of YES Network reports.

Chivilli has managed just a 6.18 ERA and 71:33 K:BB over 90.1 innings covering two major-league seasons. However, the 23-year-old ranked in the 88th percentile in fastball velocity, the 84th percentile in groundball rate and had whiff rates exceeding 40 percent with both his changeup and slider. There could be some untapped potential for Chivilli as he gets out of Colorado and into the Yankees' pitching development.

The Mariners designated Kowar (shoulder) for assignment Tuesday.

The 29-year-old righty will give up his place on Seattle's 40-man roster for Jhonny Pereda, who was acquired from the Twins on Tuesday. Kowar made 15 regular-season appearances for the Mariners in 2025 and finished the year with a 4.24 ERA and 1.24 WHIP over 17 frames before a right shoulder impingement ended his season in mid-August.

The Yankees claimed Hamel off waivers from the Rangers on Tuesday.

Hamel made one appearance for the Mets in 2025 and spent the rest of the year at Triple-A Syracuse, posting a 5.32 ERA and 75:22 K:BB over 67.2 innings. The 26-year-old will compete for a spot in the Yankees' bullpen but does have minor-league options remaining.

The Rays signed Booser to a minor-league contract Monday.

Booser was non-tendered by the White Sox earlier this offseason after finishing with a 5.52 ERA, 1.52 WHIP and 35:19 K:BB over 31 innings during the 2025 campaign. The Rays will retain control of the lefty reliever through the 2030 season.

The Angels signed Sandlin (elbow) to a minor-league contract Monday that includes an invitation to spring training, Jeff Fletcher of The Orange County Register reports.

Sandlin was limited to only 19 appearances in 2025 for the Blue Jays due to elbow trouble, with the last of those outings coming before the All-Star break. It's unclear whether he will have restrictions in spring training, but Sandlin boasts a career 3.19 ERA and 27.3 percent strikeout rate, so he'll have a good shot to make the Opening Day roster, if healthy.

Coleman signed a minor-league contract with the Yankees on Jan. 17.

Coleman made 11 appearances in the Orioles' minor-league system last season, posting a 4.91 ERA and 1.84 WHIP over 14.2 innings between Double-A and Triple-A before being released in mid-May. He'll get a chance to bounce back with the Yankees but doesn't project as anything more than organizational depth.

The Mariners designated Diaz for assignment Friday, Adam Jude of The Seattle Times reports.

With Cooper Criswell coming over from the Mets in a trade, Diaz will give up his place on the Mariners' 40-man roster. The 29-year-old southpaw made just one appearance with the Mariners near the start of the 2025 regular season, allowing one hit and striking out one batter over 1.1 innings. He spent the rest of the season at Triple-A Tacoma and turned in a 4.15 ERA and 1.32 WHIP across 138.2 frames.

The Mets traded Criswell to the Mariners on Friday in exchange for cash, Jorge Castillo of ESPN.com reports.

The 29-year-old was DFA'd by the Mets on Wednesday following the team's acquisition of Freddy Peralta and Tobias Myers, but Criswell will recapture a 40-man spot upon moving to Seattle. He posted a 3.57 ERA and 1.58 WHIP in 17.2 regular-season innings with the Red Sox in 2025 and will compete for a spot in the Mariners' bullpen during spring training.

The Yankees designated Ort (elbow) for assignment Friday.

The transaction clears a spot on the 40-man roster for waiver claim Michael Siani. Ort was a waiver claim himself earlier this month, and because he has the ability to refuse an outright assignment, his stint in the Yankees organization will likely be ending soon. The righty reliever posted a 4.89 ERA and 49:27 K:BB over 46 innings with the Astros in 2025 and missed the final month of the season with elbow inflammation.

The White Sox signed Dominguez to a two-year, $20 million contract Friday, Jeff Passan of ESPN.com reports.

There's also a mutual option for 2028, per Joel Sherman of the New York Post, and the White Sox plan to use Dominguez as their closer. The right-hander has some modest closing experience, having notched 40 saves in his career, including 11 in 2024 between the Phillies and Orioles. The 31-year-old is coming off a 2025 campaign that saw him collect a 3.16 ERA and 79:36 K:BB over 62.2 regular-season frames between the Orioles and Blue Jays. Dominguez boasts a career 27.9 percent strikeout rate, but free passes (career 10.5 percent walk rate) have been a problem. With Dominguez taking over the ninth inning, previous incumbent closer options Jordan Leasure and Grant Taylor will work earlier in games with a rotation job potentially still in Taylor's future.