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“He plays with some aggressiveness and some snap to him,” Garrett said. “He has some position flex, but more than anything else some veteran experience in the interior of the line.”

They can use all the knowledge and experience they can get. The other backups are as unproven as the new starters.

Costa said Kosier helps with many of the calls he has to make, and Romo said he will help, too. The big thing is the on-the-job experience they’ll have to get.

“We need to be thinking the same thing,” Romo said.

Romo added he’s trying to help guide them as much as he can on the practice field and in team meetings. He goes back and forth between pats on the back and kicks in the rear.

“At different times you get on them. You have to. I think that’s part of the position, part of what some guys need,” Romo said. “Other times, they need encouragement. They’re getting ripped three times by a coach, right in a row, they need you to come over and let them know that, `Hey, you’re working hard, doing right, you’re going to make mistakes. You just have to understand now that you can’t make that same one again. You learned it, boom, move on, don’t let it happen again.’”

Garrett’s confidence in the linemen is typical of his outlook for the whole club. After all, they’ve yet to miss a block or lose a game so far this season.

“When you’re zero wins and zero losses with the whole season in front of you,” Garrett said, “I think you are hopeful.”

Notes: WR Miles Austin (hamstring) appeared close to returning, as are CB Mike Jenkins (stinger) and DE Marcus Spears (groin). The outlook for CB Terence Newman (groin) is less clear. Because Mondays aren’t usually a practice day, Garrett said he wanted to err on the side of caution in hopes of everyone being ready Wednesday. … Waived S Andrew Sendejo wound up with the Jets, perhaps as a way for Rex Ryan to get inside information about his brother’s plans. Romo said Rex may be out of luck. “We get out there today and then all of a sudden he’s changed all the stuff they were doing before,” Romo said. “It’s interesting. I think Rob probably thought maybe that was some of it because he changed all his stuff. That was pretty funny.” … The Cowboys filled seven of the eight spots on their practice squad. Six went to players who’d been among their final cuts, including S Akwasi Owusu-Ansah and WR Teddy Williams.