The Boston Red Sox are among the teams interested in trading for Arizona Diamondbacks superstar second baseman Ketel Marte, according to Jon Heyman of the New York Post. Other teams that could be potential fits for Marte include the Seattle Mariners, Pittsburgh Pirates, Tampa Bay Rays, Detroit Tigers, and Toronto Blue Jays. Marte has been involved in trade rumors this offseason, but general manager Mike Hazen recently said that it's unlikely Arizona will move the 32-year-old veteran Dominican. The switch-hitting infielder was one of the big reasons why the D-backs were one of the highest-scoring teams in baseball in 2025, as he slashed .283/.376/.517 with an .893 OPS, 28 home runs, 72 RBI, 87 runs, and four steals in 126 games. Marte's 145 wRC+ led all qualified second basemen for the second straight year.

The Kansas City Royals are looking to upgrade their outfield this offseason, and they are willing to trade a starting pitcher in order to get one, according to The Athletic's Ken Rosenthal. The most logical trade candidate could be left-hander Kris Bubic, who is projected to earn $6 million in his final year of salary arbitration before free agency. The Royals aren't pursuing the most expensive outfield options in Kyle Tucker and Cody Bellinger, and they might also be out on Harrison Bader, who is believed to be seeking a three-year deal. According to people briefed on their talks, KC's preference is to add two outfielders. They may re-sign Mike Yastrzemski. Adolis Garcia, Max Kepler, Mike Tauchman, Lane Thomas, and JJ Bleday are other free-agent options. Bubic missed most of the second half with a left rotator-cuff strain, but he was cleared to begin throwing in early November and should have a normal season in 2026 after avoiding shoulder surgery.

The Pittsburgh Pirates have made a four-year offer to free-agent designated hitter Kyle Schwarber, people briefed on the team's talks told Ken Rosenthal of The Athletic. Rosenthal reports that the offer is almost certainly worth more than $100 million. The Pirates are considered a long shot to land Schwarber, who will most likely end up re-signing with the Philadelphia Phillies. The Boston Red Sox are known to be interested in the left-handed slugger, and Schwarber's hometown team, the Cincinnati Reds, are also making a push. Pittsburgh has only given out one $100 million contract (Bryan Reynolds), and they have never come close to that number in free agency. Schwarber is one of the best power hitters in baseball and is coming off a career-best 56 home runs. For the Phillies to retain the 32-year-old, they might have to guarantee Schwarber a fifth year.

The Seattle Mariners acquired left-handed reliever Jose A. Ferrer from the Washington Nationals in exchange for catching prospect Harry Ford. The 25-year-old has thrown 142 1/3 career innings with a 4.36 ERA (3.24 SIERA), 121 strikeouts, and a 1.26 WHIP. In 2025, he abandoned his four-seam fastball and posted a career-best 21.9% strikeout rate alongside a career-low 4.9% walk rate. Overall, he recorded 11 saves for Washington last season, finishing with a 4.48 ERA across 76 1/3 innings. Seattle apparently felt it needed another left-hander for the back end of its bullpen and paid a steep price to get one. According to MLB Pipeline, Ford is a top-50 prospect and widely regarded as one of the best up-and-coming catchers in the minor leagues.