The Cowboys lost their preseason opener at home. Dallas fell to the Jacksonville Jaguars 28-23 at AT&T Stadium on Saturday. Will Grier completed 22-of-31 passes for 199 yards, two touchdowns and an interception in the losing effort. John Stephens Jr. and Jalen Tolbert were on the receiving end of Grier's TD passes. Rookie running back Deuce Vaughn carried the ball eight times for 50 yards and a score. The Cowboys continue preseason action on the road against the Seattle Seahawks on Saturday night.