Detroit cut Charlie Morton after a rough stretch since the trade deadline, creating an opening in the rotation and signaling urgency to chase more wins. Morton posted a 7.09 ERA across 39⅓ innings in nine starts, including an 11.65 ERA over his final five turns. In the corresponding move, Detroit promoted Tanner Rainey from Triple-A Toledo to bolster the bullpen. Rainey, an eight-year veteran, compiled a 2.66 ERA with 33 strikeouts in 23⅔ innings across 19 games for the Mud Hens and won the 2019 World Series with the Nationals. The move adds late-inning depth as Detroit fights for a playoff spot.

The Detroit Tigers have strengthened their minor league roster by signing Tanner Rainey, a right-handed reliever and a 2019 World Series champion with the Washington Nationals. Rainey, who has a career ERA of 5.44 across 209 appearances, has shown flashes of brilliance with a solid strikeout rate but struggles with command, evident in his 14.8% walk rate. Despite a disappointing 10.57 ERA in the Major Leagues this season with the Pirates, he has demonstrated potential in Triple-A with a 3.18 ERA. The Tigers are optimistic that his fastball-slider combination, which includes a 97.9 mph fastball and a slider with an impressive 58.5% whiff rate, can add depth to their bullpen.

Rainey, who underwent Tommy John surgery in 2022, has been assigned to Triple-A Toledo, where he will have the chance to refine his command and re-establish himself as a viable option for the big league roster. The Tigers will be closely monitoring his progress, as they could greatly benefit from his high-velocity arsenal if he can find his control.

The Washington Nationals are poised for an offseason focused on improvement, following a prolonged rebuilding phase since 2019. With a promising young core, the team aims to enhance their roster by adding veteran players, particularly in the bullpen and starting rotation.

Third base presents an exciting opportunity with prospect Brady House, who has shown potential despite his struggles with strikeouts. The Nationals may opt to promote House for the upcoming season, especially if they can't secure a veteran free agent.

The Washington Nationals have decided to non-tender relief pitchers Kyle Finnegan and Tanner Rainey, allowing them to enter free agency ahead of the MLB's non-tender deadline.

Finnegan, a 33-year-old All-Star in 2024, had a solid season but struggled towards the end, finishing with a 3.68 ERA. Rainey, 31, has faced challenges throughout his career, including Tommy John surgery, and ended 2024 with a 4.76 ERA. Both pitchers are expected to find new opportunities in 2025.