MIAMI — Chad Pennington will remain with the Miami Dolphins in 2010, this time as a backup.

Pennington has agreed to a one-year contract, and the deal is expected to be signed by Monday, a person familiar with the discussions said Saturday. The person spoke on condition of anonymity because the Dolphins hadn't announced an agreement.

The Dolphins did announce the signing of former Arizona linebacker Karlos Dansby, who agreed to a $43 million, five-year contract Friday, the first day of free agency.

Pennington is recovering from the third operation on his throwing shoulder. Twice he has returned from injuries to win NFL Comeback Player of the Year, including in 2008, when he led the Dolphins to their first playoff berth in seven years.