The Pirates signed Mosqueda to a minor-league contract Tuesday that includes an invitation to spring training.

Mosqueda pitched for Triple-A Memphis in the Cardinals organization in 2025, holding a 4.52 ERA and 68:31 K:BB over 65.2 innings. The left-handed reliever has yet to reach the big leagues but will compete for a roster spot in spring training.

Henriquez underwent a UCL reconstruction surgery with an internal brace procedure on his right elbow and will miss the 2026 season, Christina De Nicola of MLB.com reports.

Henriquez appeared in line to compete for save chances heading into the 2026 campaign after putting together an impressive 2025 season. He posted a 2.22 ERA and 1.10 WHIP with a 98:27 K:BB and seven saves in 11 chances across 73.0 innings. However, he'll now shift his focus to rehabbing following a recent season-ending surgery. The Marlins expect him to be ready for next year's spring training, per an update from the team.

The Cardinals signed Shuster to a minor-league contract Monday that includes an invitation to spring training, Jon Morosi of MLB Network reports.

A first-round pick in the 2020 First-Year Player Draft, Shuster was once a prospect of some note. However, the left-hander's performance thus far at the major-league level hasn't been encouraging, as he holds a 5.27 ERA and 98:64 K:BB over 141.2 innings covering parts of three seasons. Shuster is capable of starting and relieving, and it's unclear what role the Cardinals have in mind for him, but he has a chance to make the roster on a rebuilding squad.

Hamilton signed a one-year, non-guaranteed contract with Atlanta on Friday.

Hamilton finished 2025 with a 4.28 ERA and 1.25 WHIP across 40 regular-season innings -- the worst numbers of his three-year tenure in the Bronx. The 30-year-old righty will now attempt to land a spot in Atlanta's bullpen, but even if he makes the big-league club, he won't be likely to receive many high-leverage opportunities with Raisel Iglesias, Robert Suarez, Dylan Lee and Joe Jimenez (knee) already on the roster.

The Mets outrighted Waddell to Triple-A Syracuse on Friday, Anthony DiComo of MLB.com reports.

New York designated Waddell for assignment earlier this week, and he'll remain in the organization after clearing waivers. Waddell posted a 3.45 ERA, 1.28 WHIP and 22:11 K:BB across 31.1 major-league innings last season.

Arizona outrighted Jarvis to Triple-A Reno on Friday, Alex Weiner of ArizonaSports.com reports.

Jarvis was booted from the 40-man roster and designated for assignment last Friday but cleared waivers and will remain with the Diamondbacks' organization. The 27-year-old right-hander appeared in 12 games at the big-league level with Arizona last season and carded a 5.73 ERA, 1.50 WHIP and 21:10 K:BB across 22 innings.

The Phillies acquired Backhus from the Diamondbacks on Friday in exchange for Avery Owusu-Asiedu, Matt Gelb of The Athletic reports.

Backhus is a sidearming lefty reliever who held left-handed hitters to just a .139/.225/.278 slash line in 2025. Righty bats slashed .365/.417/.571 off the 27-year-old, so manager Rob Thomson will have to be judicious with his usage of Backhus.

The Phillies acquired Bowlan from the Royals on Friday in exchange for Matt Strahm, Mark Feinsand of MLB.com reports.

Bowlan had a mini-breakout in 2025 in his first full season as a reliever, posting a 3.86 ERA and 46:17 K:BB over 44.1 innings with the Royals. The 29-year-old righty had significant splits, as he held right-handed bats to a .182/.255/.250 batting line but was torched by lefties to the tune of a .288/.358/.575 line. Bowlan is not yet eligible for salary arbitration and will be under team control through 2031.

King agreed to a one-year contract with the Padres on Thursday that includes player options for 2027 and 2028, Mark Feinsand of MLB.com reports.

King had two excellent seasons with the Padres in 2024 and 2025 and passed on a qualifying offer with the team earlier in the offseason, but he'll ultimately remain with San Diego. According to Feinsand, King will make $17 million in 2025 and will net at least another $5 million in the form of a buyout for the 2027 option. His player options for 2027 and 2028 are worth $28 million and $30 million, respectively. Assuming King can avoid any lingering issues with his shoulder -- which cost him much of the 2025 season -- he should headline the Padres' rotation in 2026.

The Diamondbacks re-signed Curtiss to a minor-league contract Tuesday.

Curtiss had chosen free agency after being booted off Arizona's 40-man roster last month, but he's now back in the organization on a new deal. The 32-year-old pitched well in 30 relief outings for the Diamondbacks in 2025, collecting a 3.93 ERA, 0.93 WHIP and 24:5 K:BB over 36.2 innings. Curtiss is likely headed to Triple-A Reno to begin the 2026 season.