Williams met with a foot specialist on Monday. He returned to watch practice on Tuesday and says he isn't concerned about the injury preventing him from playing in the regular season.
Williams says the plan is to rest for precautionary reasons. He also is facing a possible suspension for taking a diuretic with a banned substance in it three years ago. Williams fought the failed test in court, but ultimately lost the case.
Williams has yet to hear from the league about a suspension, but two sources with knowledge of the situation told the St. Paul Pioneer Press it is unlikely Williams will be suspended by the time the regular season begins on Sept. 11.
The league and the NFL Players Association are still discussing the specifics of a new drug-testing policy, the sources told the paper.
Whenever Williams is eligible to play, he says there is "no doubt" he will be ready to go.
Information from The Associated Press contributed to this report.