Arizona Cardinals running back Trey Benson underwent arthroscopic surgery on his meniscus and is expected to be sidelined four to six weeks, a source told ESPN's Adam Schefter on Wednesday.

Cardinals coach Jonathan Gannon told reporters Wednesday that Benson was being placed on injured reserve due to a knee injury and is expected to return this season.

Benson must miss at least four games while on injured reserve. The Cardinals have three games until their bye week, putting his return at Week 10 at the earliest.

Gannon said he wasn't sure when exactly Benson was injured during Thursday's loss to the Seattle Seahawks but that he believed the running back played through the injury for some portion of the contest. Benson told the Cardinals on Friday that he was sore.

Benson had ass

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