Williams (quadriceps) wasn't spotted Wednesday at the portion of practice open to the media, Matt Schneidman of The Athletic reports.
If he doesn't fit in any work behind the scenes, Williams will go down as a non-participant on the Packers' injury report for the second day in a row. Aside from starter Aaron Jones, AJ Dillon is the only other healthy running back on the Packers' active roster, so the rookie second-round pick could be in line for top backup duties if Williams can't get cleared for Sunday's game versus the Titans.