The Reds signed Ferguson to a one-year contract Tuesday, Gordon Wittenmyer of The Cincinnati Enquirer reports.

Ferguson made 70 regular-season appearances in 2025 between the Pirates and Mariners, posting a 3.58 ERA and 51:22 K:BB over 65.1 innings. The southpaw held left-handed hitters to a .184/.261/.204 batting line, so Ferguson should be leaned on heavily by manager Terry Francona in 2026 when the opposition has lefties due up.

The Giants signed Santos to a minor-league contract with an invitation to spring training Tuesday, Francys Romero of BeisbolFR.com reports.

Santos first reached the majors with the Giants in 2021 before being traded to the White Sox three years ago. The 26-year-old had a tough time with injuries the past two seasons with the Mariners, making a total of only 16 appearances due to arm and knee problems. Santos is recovered from April arthroscopic right knee surgery and has a chance to win a spot in the Giants' bullpen.

The Giants signed Foley (shoulder) to a one-year contract Tuesday.

Foley was non-tendered by the Tigers last month after missing most of the 2025 season following arthroscopic right shoulder surgery. He's not expected to be ready to pitch with the big club until midseason, per Susan Slusser of the San Francisco Chronicle. Foley will remain under team control through 2028, so it could be a sneaky signing if he can return to pre-surgery form. The 30-year-old led the Tigers with 28 saves during his last full season in 2024, posting a 3.15 ERA and 46:20 K:BB over 60 regular-season innings.

The Cubs re-signed Thielbar to a one-year contract Tuesday, Jesse Rogers of ESPN.com reports.

Thielbar collected a 2.64 ERA and 56:13 K:BB over 58 regular-season innings for the Cubs in 2025. Left-handed batters hit just .161/.211/.276 off the southpaw. Thielbar -- who will turn 39 in January -- will help set up from the left side in the Cubs' bullpen.

Atlanta signed Hernandez to a minor-league contract Nov. 18.

Hernandez split his time in 2025 between the Korea Baseball Organization's LG Twins and Triple-A Buffalo in the Blue Jays organization. The 30-year-old made nine appearances in the majors in 2024 but hasn't seen significant action at the big-league level since 2022. He'll presumably open 2026 in the rotation at Triple-A Gwinnett.

The Diamondbacks signed Campbell to a minor-league contract Dec. 5.

In parts of three seasons in the majors, Campbell has collected a 5.65 ERA and 42:16 K:BB over 43 innings. The 28-year-old reliever will give the Diamondbacks some experienced bullpen depth at Triple-A Reno in 2026.

Brewers GM Matt Arnold said Sunday that the organization is open to utilizing Zerpa as a starting pitcher, Adam McCalvy of MLB.com reports.

The left-hander was acquired from the Royals in exchange for Isaac Collins and Nick Mears, and the Brewers apparently view Zerpa as more than a relief option. The 26-year-old came up through the minors as a starter but operated as a reliever the past two years for the Royals, making all but two of his 129 regular-season appearances out of the bullpen. Even if he sticks as a starter and is fully stretched out to begin the season, Zerpa could have a short leash given his limited workload the last few years.

The Royals traded Zerpa to the Brewers on Saturday in exchange for Isaac Collins and Nick Mears, Jeff Passan of ESPN.com reports.

Zerpa finished the 2025 season with a 4.18 ERA and 1.38 WHIP across 64.2 innings while also recording 14 holds. The Brewers aren't hurting for high-leverage arms with Trevor Megill, Abner Uribe and Jared Koenig already making up the back end of their bullpen, so Zerpa will likely start out in a middle-relief role with his new club.

The Diamondbacks designated Jarvis for assignment Friday.

The transaction frees up a 40-man roster spot for Michael Soroka, whose signing was officially announced Friday. Jarvis has a 3.69 ERA over 105 innings at the major-league level, but that's come with an unappetizing 71:52 K:BB.

The Cubs signed Milner to a one-year, $3.75 million contract Thursday, Mark Feinsand of MLB.com reports.

Milner will be reunited with manager Craig Counsell, who he pitched for in three of his four years with the Brewers. The left-handed reliever spent the 2025 campaign with the Rangers, collecting a 3.84 ERA, 51.4 percent groundball rate and 58:21 K:BB over 70.1 frames.