Williams (Achilles) was placed on the active/PUP list Thursday, Darren Urban of the Cardinals' official site reports.
Williams tore his Achilles in December 2025 and was not expected to be ready for training camp. The linebacker has a chance to return for the Cardinals' season opener against the Chargers and may be able to participate in the preseason. For now, the 25-year-old is still working through the recovery process.