Dallas Cowboys running back DeMarco Murray has admitted that he is delighted with how the team's offense has been working in pre-season.

The Cowboys running offense was poor last season with Murray managing just 663 yards himself, but he now believes that the blockers are in place to help drive the team on.

"The sky's the limit," ESPN quotes Murray as saying. "These guys are working hard. I'm very, very proud of the guys we've got, the five starters and the guys behind them.

"I wouldn't want to be behind any other line. I love these guys. I've got a lot of respect for these guys. They're going to have a great year for us."

The Cowboys were defeated by the Oakland Raiders in their first pre-season game.