Ertz (shoulder) was a limited practice participant Friday, Darren Urban of the Cardinals' official site reports.
Ertz seems to have picked up the injury during last Sunday's 33-22 loss to the Bears, though he handled his usual snap share (77 percent) in a run-heavy game for Arizona. Consecutive limited practices should put the tight end on track for Monday's game against the Rams, with Saturday representing his last chance at full participation before the crucial NFC West matchup.