Contract details were not yet available, but it is believed Wynn signed for at or near the NFL minimum salary. The agreement was first reported by the Washington Times, and has been confirmed by a team official.
Wynn, 34, will be on his second tour of duty with the Redskins. He played in Washington from 2002 to 2006, and was a starter for the first three of those seasons. With the Redskins, he started 63 games, missing only one contest the first four years, but has not started more than one game in the league since 2006.
The 12-year veteran was signed to compensate for the recent losses of defensive linemen Jason Taylor and Demetric Evans, which has left the Redskins thin on the defensive line. Evans was lost to San Francisco as an unrestricted free agent, and Taylor was released after he refused to restructure his contract.
A former Notre Dame star, and the first-round choice of the Jacksonville Jaguars in 1997, Wynn has appeared in 177 games, with 128 starts. He has played with Jacksonville (1997-2001), Washington (2002-2006), New Orleans (2007), and the New York Giants (2008).
With the Giants, Wynn played in all 16 games, with no starts, and had 25 tackles and two sacks. For his career, he has 238 tackles, 27 sacks, six forced fumbles, and two passes defensed.
Despite his age, Wynn retains some value because of his versatility. He can play both end and tackle, and should be a valuable backup at both spots. The Redskins previously re-signed guard Derrick Dockery after he was released by Buffalo.
Len Pasquarelli is a senior NFL writer for ESPN.com.