While he was listed as a full practice participant Friday, the Dolphins also list Williams (ribs) as questionable for Sunday's game against the Jets, Adam H. Beasley of the Miami Herald reports.
The running back is, however, on track to suit up this weekend, as is starter Jay Ajayi, who is also listed as questionable after practicing fully Friday. As Ajayi's top backup, his is a name to know, but given the team's inclination to feature Ajayi heavily as long as he's healthy, Williams isn't anything more than a roster stash at this stage.