Keirsey signed a minor-league contract with Atlanta on Dec. 18.

Keirsey has found a new home with Atlanta after being non-tendered by the Twins and electing free agency in November. The outfielder appeared in 74 matchups with Minnesota during the 2025 season, struggling to a .107 average with two home runs, six RBI, 10 stolen bases on 13 attempts and 11 runs scored.

The Nationals claimed Wiemer off waivers from the Giants on Monday, Robert Murray of FanSided.com reports.

It's the third organization Wiemer has been in since November and fourth since August. The 26-year-old slashed .236/.279/.436 with a 2:23 BB:K over 27 contests for the Marlins in 2025. Wiemer is out of minor-league options, so he should have a good chance to make the Nationals' Opening Day roster in a reserve role.

The Giants signed Kennedy to a minor-league contract Dec. 15.

Kennedy spent a little time in the majors with three different teams in 2025, going just 2-for-29 at the plate. The 27-year-old will likely begin the 2026 season at Triple-A Sacramento, where he'll give the Giants some experienced infield depth.

The Giants signed Mahle to a one-year contract Wednesday, Mark Feinsand of MLB.com reports.

Shoulder issues limited Mahle to 16 starts and 86.2 innings in 2025 with the Rangers, but he was able to collect a 2.18 ERA, 1.13 WHIP and 66:29 K:BB. The 31-year-old right-hander has not reached 20 starts in the majors since 2022 and his strikeout rate the last two seasons sits at just 18.9 percent, but he is a worthwhile roll of the dice on a one-year deal and will benefit from spacious Oracle Park as his new home.

Wagaman was designated for assignment by the Marlins on Monday, Kevin Barral of FishonFirst.com reports.

Wagaman is the roster casualty following the addition of Esteury Ruiz from the Dodgers. Wagaman slashed .250/.296/.378 with nine home runs and four steals in 514 plate appearances for the Marlins in 2025. He has some intriguing offensive traits, including strong bat speed and solid swing decisions, but Wagaman's lack of notable power (.128 ISO) in his age-27 season while playing at the bottom of the defensive spectrum made him expendable.

The Marlins acquired Ruiz from the Dodgers on Monday in exchange for Adriano Marrero, Francys Romero of BeisbolFR.com reports.

Ruiz got into 19 games with the Dodgers in 2025, going 4-for-21 with one home run and four stolen bases. The 26-year-old led the American League with 67 steals in 2023, but he's managed just a .241/.296/.343 batting line over parts of four major-league seasons and is regarded as a poor defensive outfielder. Ruiz has a better chance to make the Marlins' Opening Day roster than he would have the Dodgers', but he does have minor-league options remaining.

The Phillies signed Cabrera to a minor-league contract Friday that includes an invitation to spring training, Mike Rodriguez reports.

Cabrera pitched for four different teams at the big-league level in 2025, collecting a 6.54 ERA and 35:18 K:BB over 42.2 innings. The southpaw reliever held left-handed batters to a .197/.295/.394line, but righties hit a robust .333/.394/.646 off him. With fellow lefties Jose Alvarado (forearm) and Tanner Banks locks for the bullpen and Kyle Backhus also around, Cabrera is a long shot to make the Opening Day roster.

The Reds designated Richardson for assignment Saturday, Gordon Wittenmyer of The Cincinnati Enquirer reports.

Following the Reds' acquisition of outfielder Dane Myers (knee) from Miami on Saturday, Richardson will end up as the roster casualty necessary to create space on the 40-man. The 25-year-old reliever finished 2025 with a 4.54 ERA, 1.54 WHIP and 30:21 K:BB across 37.2 regular-season innings. However, his 4.06 FIP indicates that he performed slightly better than what his base stats suggest, and there's a chance another team in need of bullpen depth claims the right-hander off waivers.

The Reds traded O'Donnell to the Marlins on Saturday in exchange for Dane Myers (knee).

O'Donnell spent the entire 2025 campaign with the Reds' Double-A affiliate and struggled to the tune of a .235/.326/.325 slash line across 503 plate appearances. The 23-year-old will likely report to Double-A Pensacola upon joining his new organization and aim to reach Triple-A Jacksonville by the end of 2026.

The Marlins traded Myers (knee) to the Reds on Saturday in exchange for Ethan O'Donnell.

After signing JJ Bleday to a one-year deal earlier Saturday, the Reds will continue to bolster their outfield unit by bringing in Myers. The 29-year-old received his first extended look in the majors in 2025 and slashed .235/.291/.326 with six homers, 31 RBI, 29 runs scored and 18 steals across 333 plate appearances. His right-handed bat and career .816 OPS against southpaws may enable him to work in the short side of a platoon in the Reds' outfield. Otherwise, he'll provide depth to the big-league bench or head down to Triple-A Louisville.