Running back Danny Woodhead, who was sidelined after three games last season for breaking his ankle, scored from eight yards out in the first quarter.
Woodheadâ€™s backup, Branden Oliver, who is in his second season with the team, gathered 53 yards on ten carries and the go-ahead touchdown in the second quarter.
Nine year man Philip Rivers played only the scoring drive completing two passes for a total 20 yards.
Cowboysâ€™ starters Tony Romo, Dez Bryant and Jason Witten did not see the field.
Backup Brandon Weeden started for the â€˜Boys before being replaced by third-stringer and second year man Dustin Vaughan.
Subsequently, rookie Jameill Showers took reps under center.
Rookie running back Gus Johnson had a five yard rush in the second quarter for Dallasâ€™ only points.
Darren McFadden, Lance Dunbar and Joseph Randle, who have all been nursing injuries, may be ready for their next preseason game.
Most of the attention and anticipation was on the Chargers rookie running back, Melvin Gordon, the 15th overall selection in the 2015 draft.
Gordon started in the backfield and had six carries for eleven yards.
He rushed for 4,915 yards and 45 touchdowns in his four years with the Wisconsin Badgers.