Young is dealing with a knee injury that held him out of practice prior to Week 4's loss. Even with the Week 5 bye week, Young's knee is still not 100%.
Williams went under the knife prior to Week 4's contest against the Minnesota Vikings. The Lions consider Williams week-to-week, which means the procedure Williams underwent was minor.
Travis Lewis was a full participant in practice.
Colt Anderson, Jason Avant, Bryce Brown, Riley Cooper, Jon Dorenbos, King Dunlap, Stanley Havili, Akeem Jordan, Mychal Kendricks, Derek Landri and Darryl Tapp were all listed on Philadelphia's injury report -- but they were all listed as full participants in practice.