The Dallas Cowboys and St. Louis Rams have reportedly completed a trade in which the teams are swapping former first-round draft picks. Calvin Watkins of ESPNDallas.com reports that the trade was completed on Monday. Barron, a 2005 first-round pick, and Carpenter, a 2006 first-round pick, have both been disappointments. Barron has started 74 games (including all 16 last year) but has been prone to missed assignments and penalties. And Carpenter has only started three games and never made an impact on defense.