The Minnesota Vikings say they're concerned for the health of Everson Griffen ... after the defensive end posted a series of disturbing things on his social media page Wednesday -- including a video of him waving a gun.
Griffen sent out the scary posts overnight ... and in the terrifying video, which is roughly 30 seconds in length, the 33-year-old can be seen staring wide-eyed and speaking quickly with a firearm in his hand.
"Yo, yo, yo," Griffen can be heard saying. "I'm in my house. N*****s trying to pop me. I still got clips left.