IRVING, Texas (AP) Tony Romo missed practice again Monday. It was hard to tell whether it was rest for his surgically repaired back or the first of a few days off, assuming the Dallas quarterback is finished for the preseason.

If Romo has taken his final exhibition snap, he and the Cowboys don't have much to build on for the Sept. 7 opener against San Francisco. He led two ragged quarters in a 25-20 loss to Miami and isn't likely to play against Denver on Thursday night.

Here's all anyone needs to know about how the Dallas offense played in Romo's second game since surgery for a herniated disk last December. The Cowboys were pleased to see his back hold up through three sacks and another knockdown.

"The negative plays, the sacks, certainly were an issue for our offense," coach Jason Garrett said. "Some holding penalties, some stuff that got us behind the chains, kept us out of rhythm. When you kind of pull back, you say, `OK, there were some good things here.' There were some good individual performances."

Now Romo figures to be watching the backups and the battles for final roster spots against the Broncos after getting 34 snaps in Miami. He had 41 snaps in his most extensive preseason action last year, when he was four months removed from surgery to remove a cyst from his back.

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