The Marlins acquired Blalock from the Rockies on Tuesday in exchange for Jake Brooks, Jeff Passan of ESPN.com reports.

Blalock had been designated for assignment last week and is now headed to a new organization. The right-hander holds an abysmal 8.16 ERA and 47:43 K:BB over 89.1 innings in parts of two seasons at the major-league level, but the Marlins appear optimistic they can get more out of Blalock. The 25-year-old will give Miami some rotation depth following its trades of Edward Cabrera and Ryan Weathers.

The Phillies designated Wilson for assignment Tuesday.

The transaction clears a spot on the 40-man roster for the addition of J.T. Realmuto, whose re-signing was made official Tuesday. Wilson slashed only .198/.282/.369in 52 regular-season tilts for the Phillies in 2025. However, the right-handed-hitting Wilson is a career .250/.359/.475 hitter versus southpaws and offers positional versatility, so he could draw interest via waivers.

Penrod agreed to a minor-league contract with the Nationals on Monday, which includes an invitation to spring training, Will Sammon of The Athletic reports.

Penrod began the 2025 campaign in the Red Sox organization before being traded to the Dodgers in June. He ended the season with Triple-A Oklahoma City, where he posted an 8.65 ERA and 2.42 WHIP with a 23:30 K:BB across 26.0 innings.

The Cubs signed Thornton (Achilles) to a contract Monday, Tread Athletics reports.

It's not clear whether it's a major- or minor-league contract, but Thornton has landed a deal after throwing for teams in a "Pro Day" at Tread Athletics training facility. Thornton had surgery in August to repair a torn left Achilles tendon but has a chance to be ready in time for Opening Day. The right-handed reliever posted a 4.68 ERA, 1.30 WHIP and 32:14 K:BB over 42.1 innings for the Mariners in 2025 before getting hurt.

Atlanta signed Mateo to a one-year contract Monday.

With Ha-Seong Kim (finger) set to miss at least the first six weeks or so of the season, Atlanta has added Mateo as a depth option at shortstop. The 30-year-old Mateo was plagued by injuries in his last two seasons with the Orioles, finishing with a lowly .177/.217/.266 batting line over 42 contests in 2025. He's healthy, now, though, and offers the ability to play second base, third base and all three outfield spots in addition to shortstop. Mauricio Dubon remains the likely Opening Day starter at shortstop for Atlanta, but Mateo will be in the mix while Kim recuperates from finger surgery.

The Cardinals plan to give Wetherholt "every opportunity" to make the Opening Day roster, Derrick Goold of the St. Louis Post-Dispatch reports.

Manager Oliver Marmol confirmed as much over the weekend at the team's Winter Warm-Up fan event, saying Wetherholt "definitely has a chance" to make the team. What position he might play is not yet locked down. The Cardinals opened up third base by trading Nolan Arenado, and Wetherholt is currently set to compete for playing time there with Nolan Gorman and Thomas Saggese. However, if St. Louis winds up trading Brendan Donovan, Wetherholt would then likely focus on winning the second-base job. The Cardinals' top prospect and one of the better hitting prospects in all of baseball, Wetherholt slashed .306/.421/.510 with 17 home runs, 23 stolen bases and a 72:73 BB:K over 109 games between Double-A Springfield and Triple-A Memphis in 2025.

Winn has been sprinting for weeks and will not have any limitations with his surgically repaired right knee at the beginning of spring training, Derrick Goold of the St. Louis Post-Dispatch reports.

Winn played through a slight meniscus tear in his knee for most of the 2025 season before eventually having surgery in late September. While he won his first Gold Glove, Winn's offensive production slipped, as he finished with just a .673 OPS, nine home runs and nine stolen bases. With his knee repaired, Winn plans to be more active on the basepaths in 2026, saying, "I want to be able to use that speed."

Betts said on the "What Drives You with John Cena" podcast that he will retire when he contract runs out following the 2032 season, Brent Maguire of MLB.com reports.

Betts will be 40 years old following the conclusion of his 12-year, $365 million contract, so it's unsurprising to hear he plans to hang up his cleats at that point. The 33-year-old is coming off a down 2025 campaign offensively, having slashed .258/.326/.406 with 20 home runs over 150 regular-season contests. However, Betts thrived defensively in his first season as a full-time shortstop, finishing with a plus-6 Outs Above Average, per Baseball Savant.

Kim underwent surgery Sunday to repair a torn tendon in his right middle finger and is facing an estimated recovery timeline of 4-to-5 months.

Kim inked a one-year, $20 million contract with Atlanta in December, but he'll now be unavailable for the start of the upcoming campaign after recently sustaining the injury after he slipped on ice while back home in his native South Korea, per Mark Bowman of MLB.com. The 30-year-old was limited to 48 games for Tampa Bay and Atlanta last season due to injuries, and his 2026 is also off to an unfortunate start. Based on the initial timeline, Kim shouldn't be expected to make his season debut until at least mid-May but could be out longer, potentially leaving Mauricio Dubon or Nacho Alvarez to fill in at shortstop for much of the first half.

Stewart spent the winter getting into better shape, losing 20-plus pounds, and he's been working on his defense at first base, Charlie Goldsmith of The Dayton Daily News reports.

After the Reds traded for Ke'Bryan Hayes last year, Stewart had to learn first base on the fly. He'll enter this season more comfortable at the position, and presumably has the inside track to play there regularly in 2026. The Reds still have to find playing time for both Stewart and Spencer Steer, but they can be in the same lineup with one of them at DH and the other at first base.