When country music superstar Jelly Roll steps into a WWE ring at SummerSlam tomorrow night, it will be more than just a one-off celebrity appearance. A new report from WrestleVotes reveals the Grammy-nominated artist has been undergoing intensive training for his debut, and WWE has hopes for a long-term partnership.

The 40-year-old shared on ESPN about how physical his sessions at the Performance Center have been, resulting in a broken finger right out of the gate.

Jelly Roll says he’s been at the WWE Performance Center every day for the past few weeks training for his debut. The 40-year-old musician has become a popular figure in part because of his inspirational life story that includes a 200-pound weight loss journey and overcoming a difficult past where he sold drugs and spent time in jail.