Kim signed a one-year, $20 million contract with Atlanta on Monday, Jon Heyman of the New York Post reports.

Kim finished out the 2025 campaign with Atlanta after being claimed off waivers, and he did enough to earn himself another look with the club in 2026. He slashed .253/.316/.368 with three home runs, 12 RBI and 14 runs scored in 24 games down the stretch of the 2025 season after being dumped by the Rays. Kim figures to see the bulk of his playing time at shortstop heading into the upcoming season, though he can also manage at the keystone if necessary. Mauricio Dubon is expected to be deployed as a true utility man following the addition of Kim.

The Nationals acquired Perales from the Red Sox on Monday in exchange for Jake Bennett, Jeff Passan of ESPN.com reports.

It's a prospect-for-prospect trade. Perales missed a large chunk of 2024 and nearly all of 2025 while recovering from Tommy John surgery, but he's wowed with his stuff since returning, regularly reaching triple digits with his fastball. The 22-year-old has thrown a total of 9.2 innings beyond A-ball and has a career 12.3 percent walk rate in the minors, but Perales' upside is huge.

Bennett was traded from the Nationals to the Red Sox on Monday in exchange for Luis Perales, Jeff Passan of ESPN.com reports.

Bennett pitched well during the 2025 season in his first year back since Tommy John surgery, posting a 2.56 ERA and 1.13 WHIP with 33 strikeouts across 45.2 innings at Double-A. He's yet to pitch above the Double-A level, so it wouldn't be a surprise to see him begin the 2026 campaign in Portland now that he's joined Boston's farm system. Chief baseball officer for the Red Sox, Craig Breslow, is clearly high on the southpaw. "We feel like Bennett is a high probability starter that excels in some things that are hard to teach," said Breslow, per Chris Cotillo of MassLive.com. "Fastball playability driven by above average extension and strike throwing ability. His whiff rates and ability to manage hard contact have us confident in his ability to be a major league starter."

The Blue Jays designated Bruihl for assignment Monday.

The transaction clears a spot on the 40-man roster for Tyler Rogers, whose signing was officially announced Monday. Bruihl made 15 appearances out of Toronto's bullpen in 2025, collecting a 5.27 ERA and 18:7 K:BB across 13.2 frames. The southpaw has been outrighted previously, so he would have to approve an outright assignment by the Blue Jays.

The Blue Jays signed Plassmeyer to a minor-league contract Dec. 6.

Plassmeyer spent all of the 2025 season at Triple-A Round Rock in the Rangers organization, posting a 4.43 ERA and 99:34 K:BB over 105.2 innings while splitting time between the rotation and bullpen. It's unclear what role the Blue Jays have in mind for the southpaw, but he's likely headed to Triple-A Buffalo to begin the 2026 season.

Darvish (elbow) said Monday that he's unsure whether he will continue his baseball career after completing rehab for his November UCL repair with an internal brace and flexor tendon surgery, Dennis Lin of The Athletic reports.

Darvish will miss the entire 2026 season and will be 40 years old heading into the 2027 campaign. He's owed $30 million between 2027 and 2028, so while he has financial incentive to continue pitching, the right-hander is currently focused on his rehab and will make a decision about his playing career at a later date. Darvish posted a 5.38 ERA and 68:19 K:BB over 72 regular-season innings covering 15 starts for the Padres in 2025.

The Mets are considering using Sproat as a multi-inning reliever in 2026, Will Sammon of The Athletic reports.

The Mets still view Sproat as a starting pitcher over the long haul, but there's currently not room for him in the major-league rotation and the club believes he can help in the bullpen. Sproat made four starts for the Mets in September, finishing with a 4.79 ERA and 17:7 K:BB over 20.2 innings. The 25-year-old posted a 4.24 ERA and 113:53 K:BB across 121 frames in 2025 with Triple-A Syracuse.

The Diamondbacks signed Campbell to a minor-league contract Dec. 5.

In parts of three seasons in the majors, Campbell has collected a 5.65 ERA and 42:16 K:BB over 43 innings. The 28-year-old reliever will give the Diamondbacks some experienced bullpen depth at Triple-A Reno in 2026.

The Phillies signed Garcia to a one-year, $10 million contract Monday, Francys Romero of BeisbolFR.com reports.

The Phillies are expected to trade or release Nick Castellanos this offseason, and Garcia is now lined up to replace him in right field. Garcia has just a .675 OPS and 89 wRC+ over the last two seasons, though he graded out as a solid defender in right field in 2025. He should benefit from a ballpark and lineup upgrade in 2026 in what will be his age-33 season.

The Twins signed Bell to a one-year contract with a mutual option for 2027 on Monday, Jeff Passan of ESPN.com reports.

It's the first major-league free-agent signing this offseason for the Twins. Bell should see most of the playing time at first base in Minnesota but is also an option for starts at designated hitter. The 33-year-old slashed .237/.325/.417 with 22 home runs across 140 games this past season for the Nationals.