AJ Styles Was Dealing With Multiple Injuries Before In-Ring Retirement

TLDR

AJ Styles retired from in-ring competition due to multiple injuries, particularly neck and back pain, rather than declining ability. According to Karl Anderson speaking on Busted Open Radio, Styles told him backstage after RAW that he was "too beat up" and wanted to help train the next generation. Styles has signed a new deal with WWE to remain in a behind-the-scenes developmental role following his Royal Rumble loss to GUNTHER.