The New England Patriots have announced a slew of transactions via an e-mail circulated moments ago.

Free-agent center Al Johnson has joined the team after spending the last month of 2008 with the Dolphins.

Also, four players have re-signed with the Pats:  offensive lineman Wesley Britt, safety Ray Ventrone, safety Tank Williams, and defensive lineman Mike Wright.

Johnson was drafted by the Cowboys in 2003. He missed his rookie season due to an injury, but then started 15 games in 2004 and 16 in 2005.

After losing the starting job to Andre Gurode in 2006, Johnson signed with the Cardinals in 2007. He started 14 games in his first season with the team.

The Cardinals released Johnson from injured reserve in October 2008, and he signed with the Dolphins on November 29.