Many assumed this to be the case following his match with Seth Rollins at Night of Champions 2015, where incoming WWE Hall of Famer Sting was injured.
The company acknowledged he was hurt while some of wrestling's more reliable journalists said it was a career-threatening neck injury. If this report from TMZ Sports is correct, we'll soon be getting confirmation that Dave Meltzer and Mike Johnson's initial word was correct.
According to TMZ, medical evaluations by numerous doctors over the past six months have confirmed a diagnosis of cervical spinal stenosis. This narrowing of the open space in a person's neck impacts the nervous system and leads to pain and lost sensation or mobility in extremities. It's the same diagnosis which lead to Edge's retirement in 2011.
The recommendation is that the 56 year old not wrestle again to avoid further damage, and Sting has decided to heed that advice. Apparently, an announcement is expected to coincide with WrestleMania and his induction into the Hall of Fame the night before, although that's not yet offical.
Also still up in the air is his future with WWE. Sting is open to a non-wrestling role and the company would like to keep him in the fold, but no formal pitch has been made.
More as we have it, Cagesiders.