IRVING, Texas -- Following the Cowboys' 23-20 victory over the Cleveland Browns on Sunday afternoon, owner Jerry Jones said left tackle Tyrone Smith suffered a high-ankle sprain and he wasn't sure about the availability of starting running back DeMarco Murray.

Jones didn't know about the severity of Smith's ankle and more tests were needed for an official diagnosis.

Update: A source said Monday afternon it's doubtful if Smith or Murray play against the Redskins.

However, team executive vice president Stephen Jones said Monday morning he doesn't believe Smith or Murray would play Thursday against the Washington Redskins.

"I'm dying to know right now," Jones said of their availability on KRLD-FM. "But I'm really thinking it’s probably a long shot for either one of those guys to play."

If that's the case, Jeremy Parnell will start for Smith and Felix Jones will get his sixth consecutive start over Murray.

"My expectations would be that it’s a long shot for either one of them," Stephen Jones said.