Jackson (undisclosed) won't participate in Sunday's scrimmage, Tony East of Forbes.com reports.
Analysis:It's unclear why the 28-year-old isn't participating in Sunday's scrimmage, and he's joined by T.J. McConnell (undisclosed), Larry Nance (hamstring) and Johnny Furphy (knee) on the sidelines. Jackson can be considered questionable for Wednesday's preseason opener against Minnesota until further notice.
