Red Sox trading Marcelo Mayer to Giants for reliever Erik Miller: Sources

Erik Miller is 2-0 with a 2.75 ERA this season. Meg McLaughlin / Getty ImagesAug. 3, 2026 Updated 5:28 pm EDTThe Athletic has live coverage of the 2026 MLB Trade Deadline.In an effort to bolster their pitching staff, the Boston Red Sox are trading former No. 4 overall pick Marcelo Mayer to the San Francisco Giants for left-hander Erik Miller. League sources told The Athletic. The sources spoke under condition of anonymity to discuss a deal that had not been completed. Mayer, who is currently on the IL with a bone stress reaction, has not played since June 25. His timeline for a return has not materialized.In Miller, Boston is receiving a controllable southpaw with above average velocity and elite suppression of hard contact.This story will be updated.Aug 3, 2026Connections: Sports EditionS