Tony Romo’s status for Sunday is up in the air

Quarterback Tony Romo didn’t practice Wednesday because of his sore back, but the Dallas Cowboys aren’t ready to rule him out for Sunday’s game against Arizona.

Romo underwent a CT scan for the injury he suffered when he was kneed in the back by Keenan Robinson in Monday night’s loss to Washington, but Romo did not discuss what the exam revealed, though he did say that the latest trauma was unrelated to the disc injury he suffered last December that required surgery.

“It has nothing to do with back surgery or anything like that,” he said. “He caught me perfect. It’s something you have to deal with. It could have happened years ago and it would have been the same thing. It’s part of playing football.”

Sunday’s game pits the first-place teams in the NFC East and West, with the Cowboys at 6-2 and Cardinals at 6-1, their best record since 1974.

Dallas Coach Jason Garrett said Romo’s status was “a day-by-day thing.”

“Proclamations about the game right now I don’t think are in anybody’s best interest,” Garrett said. “The biggest thing for us to do is Tony, like with any injured player we have, get treatment, see how you feel, how you feel based on the work that you do, the rehab you have and wake up the next morning and how are you doing, what can we do today.”

Backup Brandon Weeden is proceeding as if he’ll be the starter. In the 20-17 loss to the Redskins, Weeden completed four of six passes for 69 yards and a touchdown.

“He did a nice job,” Garrett said. “I thought he had poise and composure, ran the offense, handled himself in the huddle, at the line of scrimmage, made good decisions, made good throws, led us on a couple of scoring drives.”

Earlier in the day, Cowboys owner Jerry Jones said on his radio show that Romo’s ability to play would come down to pain tolerance.

“He can play,” Jones said on KRLD-FM, according to ProFootballTalk.com. “Technically, relative to the medical aspect, he can play.”

Romo wasn’t as definite on that when he spoke to reporters later.

“If it turns out to be just pain tolerance, I will play,” he said. “That part has never been an issue. But we’ve got to wait and see.”