The promotion provided an update on him via Twitter and said he suffered a muscle contusion on his neck and not a stinger as has been reported elsewhere.
He is out of the hospital but will need to rest for a few weeks before he returns to the ring.
UPDATE on @ReyFenixMx – He has been treated and released from the hospital with a muscle contusion. He is feeling good and will be back up to 100% after some rest.
We thank you all for your concern and for making #LUCHACITY such wonderful time!
— AAW Wrestling (@AAWPro) February 9, 2019