Nick Bosa has been officially ruled out with a knee injury.

The San Francisco 49ers just can't seem to shake the injury bug. Star edge rusher Nick Bosa has headed to the blue medical tent after suffering a concerning-looking injury.

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Following a play, Bosa looked as if his leg was buckled in a weird way after being double-covered by two Arizona Cardinals' linemen. Bosa walked off gingerly, but then collapsed on the sideline following the incident.

Bosa looked to be in clear pain, as he was on the turf for multiple moments. So far, there are no details regarding the severity of the injury.

From the looks of it, Bosa may have suffered something rather significant to his leg.

During the telecast, Bosa was seen leaving t

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