Parker (knee) wasn't present for Friday's practice, Jim McBride of The Boston Globe reports.
After also sitting out practice Wednesday and Thursday, Parker looks pretty iffy for Sunday's game against the Colts. If he ends up being ruled out for the contest, Tyquan Thornton, Kendrick Bourne and Nelson Agholor would be candidates to see added Week 9 snaps alongside top wide receiver Jakobi Meyers.