FILE - At left, in a July 24, 2017, file photo, Arizona Cardinals quarterback Blaine Gabbert throws a pass during an NFL football training camp, in Glendale, Ariz. At right, in a June 13, 2017, file photo, Dallas Cowboys quarterback Kellen Moore throws a pass during an NFL football practice at the team's training facility, in Frisco, Texas. Don't look for too many stars to be on the field Thursday night when the Cowboys and Cardinals kick off the NFL preseason in the Pro Football Hall of Fame game. Don't look for many starters, either. Cowboys' Kellen Moore (17) is likely to see his first action since the end of the 2015 season with the Cowboys, when he made his first two career starts. Blaine Gabbert (7) will take on quarterback duties for the Cardinals.(AP Photo/File)