The Boston Red Sox clinched a playoff spot with a 4-3 win on Sept. 28, 2025, powered by rookie José De León’s strong start.

The Boston Red Sox secured the AL's No. 5 seed with an 89-73 record, clinching a playoff berth with a 4-3 win over the Tigers on September 28, 2025. Rookie pitcher José De León, called up from Triple-A Worcester, delivered a standout performance, pitching 6⅔ innings, allowing three runs, and striking out eight in his longest major league outing. His strong showing helped preserve key relievers for the upcoming Wild Card Series against the Yankees. The Red Sox, who had previously placed several players on the injured list, including Cade Horton and Ramón Laureano, are preparing for a high-stakes postseason matchup. Other MLB developments included roster moves, the upcoming rollout of an automated ball-strike system in 2026, and ownership changes, such as the Rays approving Patrick Zalupski as their new owner.