From JesusAguilera.com:
Following the results of a CATSCAN and MRI he has a massive herniated 6/7 disc in his neck which is causing nerve problems resulting in lose of feeling in his left arm and left pec. He also has minor damage to his 5/6 disc which also requires treatment. The surgery is scheduled for January Monday 17th and the doctors have told him he has a 90% chance of full recovery. Please keep Aaron in your prayers at this time and hopefully we’ll have good news to report soon.
Recovery is expected to take three months if he follows doctor’s orders with regards rehab and therapy and he has told me he will and hopes to come back quicker than anyone thought possible because of his desire to return to WWE.
Aaron has asked me to thank everybody at WWE for paying for his surgery and paying him whilst not on the road. A special thank you to Tommy Dreamer as well for all his support. Aaron promises to be back soon and repay everyone’s faith in him.