Williams reverted to the Bengals' practice squad Monday, per the NFL's official transaction log.
Samaje Perine (COVID-19) was unavailable for Sunday's contest, so Williams was elevated from the practice squad and carried six times for 13 yards behind Joe Mixon. Williams could be promoted again Week 7 if Perine remains sidelined, though Chris Evans would likely continue to work as Cincinnati's top backup at tailback.