HENDERSON, Nev. -- Las Vegas Raiders starting right guard Jackson Powers-Johnson is expected to go on injured reserve and could potentially miss the remainder of the season due to an ankle injury, a source told ESPN.

Powers-Johnson was injured in the second quarter of Thursday night's 10-7 loss to the Denver Broncos . The second-year lineman rolled his ankle while Denver edge rusher Nik Bonitto sacked Raiders quarterback Geno Smith .

The former Oregon standout was helped off the field and eventually carted into the locker room. Raiders head coach Pete Carroll said postgame that he expected Powers-Johnson to be out "for a while."

Powers-Johnson is not expected to have surgery, a source said.

With Powers-Johnson sidelined, the Raiders will be without at least two starters on

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