UPDATE 3 (FINAL UPDATE):
UPDATE 2: Enzo has been discharged from the hospital.
ORIGINAL: As noted earlier, Enzo Amore was injured at WWE Payback after his neck whiplashed against the bottom rope. Enzo collapsed outside of the ring and the match was immediately stopped by the referee as trainers ran down to ringside.
Michael Cole updated fans towards the end of the show. Enzo was diagnosed with a concussion but all other tests came back negative so that sounds like good news. Hopefully, there will be more updates on Monday.
WWE posted the following footage of Enzo getting loaded into the ambulance: