There's no indication whether the grand jury will take up further allegations against Vick, although federal prosecutors have said they plan to seek a superseding indictment in the case.
That would mean more charges against Vick, the lone defendant who has not been convicted now that all three of his co-defendants have reached plea deals.
Vick's attorneys were negotiating with federal prosecutors last week, hoping to strike a deal on a plea agreement.
"It seems to be a pretty clear indication there will be some sort of plea entered," Falcons owner Arthur Blank said Friday.
Prosecutors have declined to comment outside court on negotiations with Vick's attorneys. Collins Spencer III, a spokesman for Vick's defense team, said Sunday there was nothing new to report.
Vick's last two co-defendants pleaded guilty Friday and said he bankrolled gambling on dogfights at Vick's property in rural Surry County, not far from his hometown of Newport News. One said Vick helped drown or hang dogs that didn't do well.
Quanis Phillips of Atlanta and Purnell Peace of Virginia Beach entered plea agreements and agreed to testify against Vick. Tony Taylor of Hampton struck a similar deal last month.
The gambling allegations alone could trigger a lifetime ban under the NFL's personal conduct policy.
The NFL has barred Vick from the Falcons' training camp but has withheld further action while the league conducts its own investigation.
Peace, Phillips and Taylor pleaded guilty to the same charges facing Vick: conspiracy to travel in interstate commerce in aid of unlawful activities and conspiracy to sponsor a dog in an animal fighting venture.
The offense is punishable by up to five years in prison and a $250,000 fine.
Sentencings are set for November and December.
Copyright 2007 by The Associated Press