Dolphins spokesman Harvey Greene would not say Saturday if the lawsuit was related to the arbitrator's ruling last month.
"It's in the judicial system and we cannot comment further,"
The suit was filed Friday, and was not entered into the court's
online registry by Saturday. A message left Saturday for Williams'
attorney, David Cornwell, was not immediately returned.
Williams left the Dolphins shortly before training camp because
he disagreed with the NFL over a disputed drug test. He is seeking
to return to the league.
The Miami Herald has quoted Williams as saying he has failed
three drug tests: in May 2002, last December, and sometime last
Williams rushed for 3,225 yards in two seasons with the
Dolphins, including a league-best 1,853 yards in 2002.