What happened: The 39-year-old finalized a multi-year agreement with the promotion. Co-founder KSI announced the acquisition during a live event in London.

Why it matters: The transition follows the recent expiration of his contract and a decision by the UFC not to re-sign him. He exits MMA after a victory at UFC Paris last month to test his striking in the boxing ring.

What to watch: An opponent and date for his boxing debut have not yet been finalized.