Kevin Johnson out with another concussion

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Texans cornerback Kevin Johnson just received clearance under NFL concussion protocol Friday. He lasted less than four quarters Sunday.

Johnson took another shot to the head and is out with a concussion, the Texans announced.

In a scary incident in the preseason, Johnson banged his head hard on the turf after being beaten by 49ers receiver Marquise Goodwin. He was diagnosed with a concussion Aug. 18, needing more than two weeks to pass concussion protocol.

Now, Johnson is back in concussion protocol.