The White Sox designated Rolison for assignment Tuesday.

The transaction frees up a spot on the 40-man roster for Sean Newcomb, who was signed Tuesday. Rolison was a waiver claim of the White Sox earlier this month and will now be up for grabs on waivers again. He held a 7.02 ERA and 25:20 K:BB over 42.1 innings with the Rockies in 2025.

The White Sox signed Newcomb (elbow) to a one-year, $4.5 million contract Tuesday.

Newcomb was terrific as a full-time reliever after being traded to the Athletics last season, collecting a 1.75 ERA and 50:14 K:BB over 51.1 innings. The left-hander will get an opportunity to start in Chicago, per Will Sammon of The Athletic, though he could eventually shift back to a relief role. Newcomb's 2025 campaign ended prematurely due to left elbow inflammation, but he should be ready to go for 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 Tigers re-signed Mattison to a minor-league contract Dec. 18 that includes an invitation to spring training, Evan Petzold of the Detroit Free Press reports.

Mattison was non-tendered by the Tigers last month, but he's now back in the organization and will be in big-league camp this spring. The righty reliever boasts a 32.8 percent strikeout rate in the minors but has been held back by a bloated 13.4 percent walk rate.

The Guardians signed Heuer to a minor-league contract Monday that includes an invitation to spring training, Tim Stebbins of MLB.com reports.

Heuer got into three games between the Rangers and Tigers in 2025 but spent most of the season at the Triple-A level, where he held a 3.14 ERA and 62:17 K:BB over 48.2 innings. The 29-year-old reliever will compete for a spot in the Guardians' bullpen but is likely headed to Triple-A Columbus to begin next season.

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.

The Guardians designated Bruihl for assignment Saturday.

Cleveland just acquired Bruihl from Toronto in exchange for cash considerations Wednesday, but it appears the Guardians no longer see the southpaw as part of the team's big-league bullpen after they signed Shawn Armstrong on Thursday. Bruihl can elect to become a free agent if he passes through waivers unclaimed. He may have to settle for a minor-league deal eventually, as he holds a career 4.72 ERA and 1.37 WHIP with a 69:32 K:BB over 89.2 innings across 94 games spanning parts of five campaigns.

The Yankees signed Blackburn to a one-year, $2 million contract Saturday, Jon Heyman of the New York Post reports.

Blackburn began last season with the Mets but was released in mid-August. He was subsequently signed by the Yankees, with whom he made eight appearances out of the bullpen, posting a 5.28 ERA, 1.30 WHIP and 16:4 K:BB over 15.1 regular-season innings. While those numbers aren't impressive, the bulk of the damage against him came in his team debut, when he gave up seven runs over 3.1 frames against Boston. Over his remaining seven appearances, Blackburn was much more effective, yielding just three runs (two earned) while posting a 14:2 K:BB across 12 innings. The veteran right-hander will likely work as a middle- and long-relief option next season with New York and also gives the team rotation depth given his history of working as a big-league starter.

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.