The Chargers opened Matlock's (undisclosed) 21-day return window Monday, Alex Insdorf of BoltBeat.com reports.
The Chargers placed Matlock on IR with a designation to return in late August. The team now has until Oct. 26 to return the fullback to the active roster, or he will spend the entirety of the 2026 season on IR. Matlock played 16 regular-season games for the Chargers in 2025, logging four receptions for 12 yards and a touchdown over 333 offensive snaps.