The team has been hit with a rash of injuries on the interior of the offensive line, with free agent addition
The club has instructed guards
Holland was originally acquired by the Cowboys in a 2008 trade. He has started 14 games with the club in four seasons, including 10 in 2011, and has 60 starts in a nine-year career.
Also a nine-year vet, Dockery signed with the Cowboys at the beginning of the 2011 regular season. The team had planned for him to take over the starting job, but he suffered a knee injury in his first game and after recovering, filled a backup role the remainder of the year.
Added for depth midway through 2011, the seven-year veteran Loper was never activated for a game as a Cowboy.