Atlanta outrighted Molina to Triple-A Gwinnett on Friday.

Molina was claimed off waivers from the Rockies earlier this month. The 23-year-old right-hander sports an ugly 6.96 ERA, 1.61 WHIP and 65:28 K:BB across 94.1 innings spanning 52 appearances (two starts) over the previous two seasons with Colorado.

The Pirates acquired Montgomery from the Rays on Friday in a three-team trade, Chandler Rome and Ken Rosenthal of The Athletic report.

Montgomery logged a 5.67 ERA and walked 27 over 46 innings with the Rays in 2025, but he also struck out 63 batters and, at 98.7 mph, has one of the hardest average four-seamer velocities in the game. The lefty has past starting experience, but the Pirates are likely to keep Montgomery in the bullpen, and he could work his way into high-leverage appearances.

May said Thursday that he currently weighs 220 pounds after pitching the 2025 season at 198-202 pounds, John Denton of MLB.com reports.

May had surgery for an esophagus rupture in 2024, which made it difficult for him to keep weight on. His goal this offseason has been to put that weight back on, and he hopes to be up to 225 pounds by spring training. May's fastball velocity was in the 59th percentile in 2025 after it was routinely in the 90-plus percentile in previous seasons, and it's possible the weight loss had something to do with it. The 28-year-old also noted that his arm is "back to normal" after he finished the season on the injured list with right elbow neuritis. May took a one-year, "prove it" contract from the Cardinals in hopes of bouncing back and reestablishing his market next offseason.

The Phillies signed Keller to a two-year, $22 million contract Wednesday, Matt Gelb of The Athletic reports.

Keller was a full-time reliever for the first time in 2025 with the Cubs and excelled, collecting a 2.07 ERA, 0.96 WHIP and 75:22 K:BB over 69.2 regular-season innings. The Phillies intend to keep him in a bullpen role, though his past starting experience allows for the possibility that he could make some starts, if needed. Keller is in line to help set up for closer Jhoan Duran.

The Giants signed Houser to a two-year, $22 million contract with a club option for 2028 on Tuesday, Jeff Passan of ESPN.com reports.

Houser showed more velocity and put together a bounce-back season in 2025, collecting a 3.31 ERA and 92:38 K:BB over 125 innings covering 21 starts between the White Sox and Rays. The veteran right-hander will turn 33 in February and lands in a favorable home environment in Oracle Park, but Houser's fantasy value will remain limited because of a lack of strikeouts.

Bido was designated for assignment by Atlanta on Monday.

Bido will lose out on his 40-man roster spot after the club agreed to a one-year deal with Ha-Seong Kim. Bido was claimed off waivers by Atlanta just over a week ago and will now head back to the waiver wire following Monday's transaction.

The Nationals acquired Perales from the Red Sox on Monday in exchange for Jake Bennett, Jeff Passan of ESPN.com reports.

It's a prospect-for-prospect trade. Perales missed a large chunk of 2024 and nearly all of 2025 while recovering from Tommy John surgery, but he's wowed with his stuff since returning, regularly reaching triple digits with his fastball. The 22-year-old has thrown a total of 9.2 innings beyond A-ball and has a career 12.3 percent walk rate in the minors, but Perales' upside is huge.

Darvish (elbow) said Monday that he's unsure whether he will continue his baseball career after completing rehab for his November UCL repair with an internal brace and flexor tendon surgery, Dennis Lin of The Athletic reports.

Darvish will miss the entire 2026 season and will be 40 years old heading into the 2027 campaign. He's owed $30 million between 2027 and 2028, so while he has financial incentive to continue pitching, the right-hander is currently focused on his rehab and will make a decision about his playing career at a later date. Darvish posted a 5.38 ERA and 68:19 K:BB over 72 regular-season innings covering 15 starts for the Padres in 2025.

Kelly agreed to a two-year, $40 million contract with the Diamondbacks on Sunday, Ken Rosenthal of The Athletic reports.

The 37-year-old right-hander was dealt by the Diamondbacks to the Rangers at the trade deadline in July, and he'll now return to the desert for an eighth season. Kelly should step back in as Arizona's ace after posting a 3.52 ERA, 1.11 WHIP and 167:48 K:BB across 184 innings last season.

May signed a one-year contract with the Cardinals on Saturday that includes a mutual option for 2027, Jeff Passan of ESPN.com reports.

May set a new career high with 132.1 innings pitched between the Dodgers and Red Sox in 2025, though his 4.96 ERA and 1.42 WHIP in the regular season both marked significant regression from previous years. Despite his recent struggles, the 28-year-old righty should have little trouble claiming a spot in a Cardinals rotation that doesn't feature much depth following the departure of Sonny Gray.