Tony Romo has throwing session

ARLINGTON, Texas -- Jerry Jones hopes that Dallas Cowboys quarterback Tony Romo will play again this season, and the owner/general manager's optimism grew after a pregame throwing session Sunday.

Jones said that Romo threw Sunday for the first time since breaking his left collarbone in the Oct. 25 loss to the New York Giants. The injury is expected to sideline Romo at least another three weeks, according to a source.

Team sources told ESPN Senior NFL Analyst Chris Mortensen earlier Sunday that Romo was due for X-rays either Sunday or Monday, but Jones said after the game that X-rays weren't necessary at this point.

"X-rays won't help us, relative to how and what degree it's mended and what degree it can take a lick," Jones said. "There may be some just to see if there's some kind of technical alignment or something like that, and I'm not real qualified or knowledgeable to talk about that. But we didn't think an X-ray or X-rays or those type of things will help us make a decision. It's going to be how it's feeling."

Backup quarterback Jon Kitna has had back-to-back outstanding performances during the 3-7 Cowboys' two-game winning streak, but Jones said Kitna's success would not affect the decision about Romo's return.

"When I think of Tony, I think of it more as when he's ready, that type of thing, more than I think about how well Kitna's played," Jones said.

Jones believes there is value in finishing a season with a "good taste" in the Cowboys' mouth, which is why Romo could play in December even if Dallas is officially eliminated from playoff contention.

Tim MacMahon covers the Cowboys for ESPN Dallas. You can follow him on Twitter or leave a question for his weekly mailbag. Information from ESPN Senior NFL Analyst Chris Mortensen was used in this report.