IRVING, Texas – The Cowboys have decided to waive defensive end Michael Sam. The practice squad player who joined the team on Sept. 3, spent the first seven weeks of the season on the 10-man squad and never made it to the 53-man roster. Sam, the first openly-gay player in the NFL, was a seventh-round draft pick of the Rams. He spent all of the offseason and training camp with the St. Louis before being released and signed to the Cowboys' practice squad. The move opens a spot for linebacker Troy Davis, a second-year pro from Central Florida who worked out with the team on Monday.