Casey Fossum, who was rusty in his first rehab outing Saturday for Double-A Portland, will try again today and most likely Thursday.
Fossum is scheduled to go two innings today. Manager Grady Little said the Sox will decide later in the week whether Fossum will return as a reliever or a starter. Fossum could return this weekend as a reliever, or after the All-Star break if the Sox want him to start.