Billings (knee) did not appear on the Cardinals' injury report Wednesday, Josh Weinfuss of ESPN.com reports.
Billings was unable to play in Sunday's 31-7 loss to the Seahawks after suffering a knee injury earlier in the week, but he now appears to be back to full health. The 31-year-old will likely be back in his role as a primary reserve option behind Roy Lopez (groin) and Walter Nolen at defensive tackle versus San Francisco in Week 3.