Former WWE Champion CM Punk’s debut fight for the UFC against Mickey Gall will have to be delayed as Punk is scheduled to undergo back surgery for a herniated disc, according to an interview he did with MMAFighting.com where Punk revealed that he had been training with the herniated disc for the entire span of his UFC training and that his back had been hurting, stemming from his time as a professional wrestler.

Punk stated that his back had gotten bad enough that he was unable to train at times and that he had undergone different techniques to get healthy before surgery was decided and that he learned about the surgery right before he and Mickey Gall had a face-to-face inside the Octagon to promote Punk’s debut fight.