http://www.nba.com/timberwolves/news...ns-090803.html

The Minnesota Timberwolves today announced the team has signed restricted free-agent center Ryan Hollins to an offer sheet. Under the terms of the NBA’s Collective Bargaining Agreement, the Dallas Mavericks will have seven days upon receiving the offer sheet to match Minnesota's offer. Per team policy, terms of the contract offer were not disclosed.