July 18, 2025 5:14 PM : Koss (hamstring) is expected to begin his minor-league rehab assignment next week, Shayna Rubin of the San Francisco Chronicle reports.
Analysis: Koss resumed baseball activities shortly before the All-Star break and is approaching a minor-league rehab stint. The infielder has been on the shelf since July 1 due to a strained right hamstring. He should be activated in late July or early August.