SAN DIEGO -- The Dallas Cowboys offense was vastly improved from the first preseason game.

In the opener against Oakland, the Cowboys produced just one first down with the first team. Saturday night at San Diego, the top group produced a field goal and six first downs. The run game, which struggled against Oakland, looked good Saturday. Running back DeMarco Murray had two five-yard runs and Felix Jones produced rushes of six and eight yards.

"We obviously moved the ball much better on offense," coach Jason Garrett said. "We made plays in the passing game and I thought we ran it better. I thought we protected better. We got bogged down a couple times with some penalties in the first half; we obviously have to clean those up. We have to continue to work on that as a coaching staff and the players have to take that to the ball game."

Overall, quarterback Tony Romo looked more comfortable in the pocket. He completed 9-of-13 passes for 75 yards. He led the Cowboys on a field goal drive on the second offensive possession and was able to produce 102 of total offense.

Romo wasn't sacked Saturday night and was quite pleased with center David Arkin, who played three quarters.

"Arkin's been doing good, he keeps improving," Romo said. "He showed some really good signs and some good things and we have to go back and watch the tape and see what we need to correct. I'm proud of his effort. I don't know if anybody has ever taken as many snaps in the preseason or practice. He probably has set a record for snaps played in practice and in games."