Williams finished Sunday's game in Oakland, playing 66 of 72 snaps.
The Bills were without cornerback Stephon Gilmore and defensive tackle Marcell Dareus in practice on Wednesday, but injured reserve isn't an option for either player since their injuries aren't "major" and thus wouldn't qualify for the designation.
Here is the Bills' full injury report Wednesday:
Did not participate:
DT Marcell Dareus (knee)
CB Stephon Gilmore (concussion protocol)
S Aaron Williams (hip)
K Dan Carpenter (groin)