Diaz rejected the Mets' one-year, $22.025 million qualifying offer Tuesday, Alden Gonzalez of ESPN.com reports.

Diaz opted out of the two years and $38 million remaining on his contract with the Mets earlier this month, and now he has passed on the qualifying offer. Neither decision was a surprise, as the closer shouldn't have difficulty netting a big multi-year pact this winter. If he leaves the Mets, New York will receive a draft pick as compensation.

The Red Sox designated Winckowski (elbow) for assignment Tuesday, Chris Cotillo of MassLive.com reports.

The move frees up a spot on Boston's 40-man roster. Winckowski made just six appearances for the Red Sox in 2025, as he spent time in the minors and also missed a large chunk of action with a flexor strain. It's unclear what Winckowski's current health status is. The 27-year-old has a career 4.20 ERA and 195:89 K:BB across 242.1 innings.

The Rays acquired Guerrero from the Red Sox on Tuesday in exchange for Tristan Gray.

Guerrero was outrighted off Boston's 40-man roster last week after passing through waivers unclaimed, but now he's on the move to a new organization. The right-hander holds a 2.63 ERA but a 19:16 K:BB across 27.1 frames covering parts of two major-league seasons. Guerrero has a big arm and the Rays will now be tasked with getting him to throw more strikes, which is something they've had success with as an organization with other hurlers.

The Diamondbacks outrighted Montes De Oca (back) to Triple-A Reno on Monday.

The transaction frees up a spot on the Diamondbacks' 40-man roster. Montes De Oca is recovering from surgery to repair a stress fracture in his back and it's not clear when he will be ready to pitch again. The reliever tossed 2.2 scoreless frames in his lone appearance for Arizona in 2025 and held a 4.07 ERA and 26:6 K:BB over 24.1 innings at Triple-A Reno.

Keller is drawing free-agent interest both as a starter and reliever, Joel Sherman of the New York Post reports.

Keller flourished with the Cubs in 2025 in a full-time relief role, collecting a 2.07 ERA, 0.96 WHIP and 75:22 K:BB over 69.2 regular-season innings. He's a good bet to sign somewhere as a high-leverage reliever, but there are also clubs that think the 30-year-old could have success moving back to a starting pitcher role.

The Padres re-signed Hart to a one-year, $1 million contract with a $2.5 million club option for 2027 on Monday, Robert Murray of FanSided.com reports.

The Padres declined Hart's $5 million club option for 2026 earlier this month, but they've now brought him back at a lesser rate. Hart split his time between the majors and minors in 2025, finishing with a 5.86 ERA and 37:13 K:BB over 43 regular-season innings covering six starts and 14 relief outings with the big club. The southpaw will compete for an Opening Day roster spot -- perhaps in a swingman role -- but does have minor-league options remaining.

Sandlin (elbow) elected to become a free agent Monday.

Sandlin cleared waivers after being removed from the Blue Jays' 40-man roster and has opted for free agency rather than accepting an outright assignment. The 28-year-old missed much of the 2025 season with a right elbow injury and it's unclear what his current health status is. With a career 3.19 ERA and 27.3 percent strikeout rate over parts of five major-league seasons, Sandlin will draw plenty of free-agent interest as long as his medicals come back clean.

Ortiz was traded from the Dodgers to the Mariners in exchange for minor-league pitcher Tyler Gough (elbow) on Sunday, Fabian Ardaya of The Athletic reports.

Ortiz was just added to Los Angeles' 40-man roster Nov. 6, but he will now head to the Mariners organization. The left-hander began the 2025 campaign with Single-A Rancho Cucamonga, but he was able to work his way all the way up to Triple-A Oklahoma City, posting a 2.76 ERA with 14 strikeouts over 15 appearances, including one start, with OKC. Ortiz will look to compete for a spot in the major-league bullpen when Seattle regroups at spring training in February.

Sandlin (elbow) cleared waivers Saturday and was sent outright to Triple-A Buffalo, Ben Nicholson-Smith of Sportsnet.ca reports.

Sandlin was effective in the big leagues in 2025, turning in a 2.20 ERA and 1.16 WHIP across 16.1 regular-season innings with the Jays. However, right elbow inflammation sent him to the injured list in early July, and multiple setbacks in his recovery prevented him from returning. The 28-year-old righty will likely elect free agency and could attract significant attention after posting a 3.19 ERA through his first five MLB seasons.

Contreras signed with the Rakuten Golden Eagles of Nippon Professional Baseball on Thursday.

Contreras spent the 2025 season split between the Orioles and Rockies organizations, working both as a starter and reliever. He was released by Colorado on Wednesday, likely to allow him to sign the deal overseas.