For the second time in less than 24 hours, the Dallas Cowboys are dealing with a big injury. First-round pick Ezekiel Elliot is expected to miss some time this month due to a lingering hamstring issue.

Cowboys executive vice president Stephen Jones told ESPN.com that there's no "definitive timetable" on Elliot's return and that the team is going to be "conservative" with Elliot's health during his recovery.

Jones didn't say when the injury happened, but did note that Elliot has been dealing with a sore right hamstring. The running back was unable to finish practice on Tuesday.

The good news for the Cowboys is that the injury might only be a "tweak," according to NFL.com. In that case, the Cowboys would only be holding him out of practice as a precaution.

Ezekiel Elliot is dealing with a sore hamstring. USATSI

The Cowboys obviously don't want Elliot's injury to linger into the season, which is why they're putting him on the sideline now. Elliot's injury could've meant more preseason carries for Darren McFadden, but that won't happen because McFadden's also out with an injury after breaking his elbow in a freak accident.

With McFadden and Elliot both out in the short term, that will likely mean more preseason carries for Alfred Morris, who signed a two-year deal with the Cowboys in March.

Anyway, Elliot's injury is just the latest piece of bad news for a team that seems to get hit with bad news every week. Not only are the Cowboys dealing with Elliot's injury, they're also dealing with an injury to backup quarterback Kellen Moore, who broke his ankle in practice on Tuesday -- and that's just the offensive side of the ball.

On the defensive side , the team is dealing with suspensions to Randy Gregory, DeMarcus Lawrence and Rolando McClain.