Barron was in Dallas on Monday and is expected to be on the field May 17 for the Cowboys' first OTA (organized team activity) practice session.
Barron, the 19th overall pick in 2005 - one spot ahead of former No. 20 selection Marcus Spears - replaces some of the veteran experience lost when the Cowboys released long-time starter Flozell Adams in April. Barron has started 74 of 76 career games, including two seasons at left tackle.
Barron and Carpenter were made expendable by their old teams during the NFL Draft.