Tyron Smith says he's a gameday decision

IRVING, Texas -- Tyron Smith is hoping to play Thursday against Washington, but the Cowboys left tackle can make no guarantees.

Smith suffered a high left ankle sprain in Sunday’s win against Cleveland, missing the final three quarters. He reported to Valley Ranch on Sunday night for treatment and had more on Monday, but he was not able to practice.

“Depending on how this week goes, basically a game day decision,” Smith said. “I’m trying my best to get back healthy.”

Smith said he had a worse high ankle sprain while playing at Southern Cal and did not miss any action. Leading into his first game as a rookie last year, he was able to overcome a knee injury to start against the New York Jets.

With only four days between games, Smith’s chances of playing are hurt some. It is possible he could dress as a backup and play only in an emergency against the Redskins with Jermey Parnell taking over as the starter.

“I don’t want to be out there playing hurt to where I get my teammates hurt,” Smith said.

Parnell replaced Smith on Sunday. Smith returned to the sidelines but said the ankle felt too weak to return and stiffened up. He was not in a protective boot when spotted in the locker room or on the practice field.

If Smith cannot play, then Cowboys coach Jason Garrett said Derrick Dockery would serve as the swing tackle. Dockery started at right guard Sunday with Mackenzy Bernadeau taking over at center for Ryan Cook.

“He’s played a little bit of tackle in this league,” Garrett said. “He’s a bigger, longer guy. He played guard yesterday for us with Mackenzy moving over to center, so he has to be versatile and then we’ll have to make our next best move if that were the case.”