PHILADELPHIA (973espn.com) - The mood surrounding Carson Wentz's future for the rest of the 2018 season may be trending in a negative direction but things could have gone much worse.

A day after Doug Pederson surprised the Delaware Valley by adding the third-year quarterback to the organization's lengthy injury list and the NFL Network further explained that Wentz could be shut down for the rest of the season, ESPN's Adam Schefter reported that Wentz underwent a CT scan Wednesday which came back inconclusive and is scheduled for an MRI on Thursday.

Back issues can be tricky and Wentz has been playing through an issue since late October, according to NFL sources. That's a potential explanation of the spikes in mobility from week-to-week for Wentz as stiffness or spasms can certainly impact movement.

“Sometimes he just gets a little sore, a little tight,” Pederson said.

Wentz is also seeking outside opinions on the back, according to Philly.com.

The outside opinions are likely to confirm an early diagnosis of a fractured vertebrae that, if allowed time to rest, would fully heal without complications, according to Schefter.

Fractured vertebrae may sound bad but if it's a transverse process fracture, which is a lateral process of a vertebra, that's an injury that has been played through by many with a week-or-so of rest, including Eagles running back Jay Ajayi earlier this season.

Although Wentz has not been ruled out for Sunday's game in Los Angeles an NFL source told 973espn.com that backup Nick Foles has been told to be ready to play this weekend.

As for Wentz playing through injury to this point that's status quo for the NFL, something Pederson, a former QB himself acknowledged.

"Listen, every player is going to play with a little nagging injury from time to time," Pederson said. "That’s just the way it works in this business."

-John McMullen covers the Eagles and the NFL for 973espn.com. You can reach him at jmcmullen44@gmail.com or on Twitter @JFMcMullen