Pittman (foot) wasn't present for the open portion of Friday's practice, Mike DeFabo of The Athletic reports.
The Steelers listed Pittman as a limited participant Wednesday before downgrading him to non-participation Thursday. The trend isn't promising, though it's still possible Pittman will get some work in before the end of practice Friday afternoon. The Steelers face the Patriots on Sunday at 1:00 p.m. ET.