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.

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 Orioles designated Walker for assignment Friday, Roch Kubatko of MASNSports.com reports.

Walker was claimed off waivers from Atlanta earlier this month after he was previously DFA'd by Baltimore in November. He's now going to be exposed to waivers once again. The 31-year-old left-hander appeared in three games for Toronto last season, turning in a 7.20 ERA, 2.00 WHIP and 8:2 K:BB across five innings of work at the big-league level.

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.