Broadcast reports have said Adams is close to re-signing.
Barnes also said negotiations on a contract extension for linebacker Peter Boulware, whom he also represents, have been slow as well. Barnes said he doesn't foresee anything happening with Boulware until after the season, when the linebacker's contract expires.
Barnes, however, said he was pessimistic over getting linebacker Ray Lewis' deal done the day before the All-Pro signed a $50 million deal, including a league-record $19 million signing bonus.
A league source said the deal may not get done anytime soon.
"It could be Friday, it could be never," the source said.
Ravens coach Brian Billick said he spoke with Adams yesterday and discussed the player's conditioning. Billick said that if Adams is re-signed, it would take three weeks to get him into shape, no matter when he signed, if ever.