Williams (hamstring) is listed as doubtful for Sunday's game against the Jets, Michael Rothstein of ESPN.com reports.
With safety Erik Harris (calf) also listed as doubtful, the Falcons' depth in the secondary will be tested across the pond. Williams has also been working as the team's punt returner, so Atlanta will need to find someone else to handle that role if Williams sits out Sunday as expected. Cordarrelle Patterson has extensive experience as a return man, but Atlanta may not want to pile more onto his plate given Patterson's significant involvement on offense as both a running back and wide receiver.