Raiders defensive end Maxx Crosby is doubtful to return to Sunday's AFC West matchup vs. the Chiefs because of a left knee injury, CBS Sports' Tracy Wolfson reported on the broadcast.

ESPN's Adam Schefter also reported that Crosby is dealing with a back injury.

The injury seemingly occurred in the second quarter when Chiefs tight end Noah Gray blocked Crosby low underneath his knees to put him on the ground. CBS Sports' rules analyst Gene Steratore shared that this block was legal, which can be seen below. Crosby was evaluated on the sidelines after the hit.

This is a developing story. Check back for updates.

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This article was originally published on www.si.com as Maxx Crosby Doubtful to Return in Raiders-Chiefs Matchup After Taking Low Block.

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