Williams (shoulder) is doubtful for Sunday's game against the Bills, James Walker of ESPN.com reports.
Williams created some optimism about a potential return this week by returning to practice on a limited basis Thursday. However, he was unable to build on that, as he was a non-participant in Friday's session, according to Armando Salguero of the Miami Herald, making it likely that Williams will miss his third consecutive game due to the dislocated left shoulder. Assuming Williams sits out, Kenyan Drake will once again handle the bulk of the touches out of the Dolphins' backfield. Considering Drake has reeled off 100-plus-yard rushing performances the last two weeks, Williams may have to settle for a limited role in the Dolphins' offense once he's cleared to play again.