"Recently, I faced a significant hurdle: I underwent an emergency spinal fusion and laminectomy of my entire thoracic spine," Frank said.

One of the most popular UFC fighters of all time is giving fans an update on the current state of his health. Frank Mir revealed that recent emergency surgery will postpone his return to the ring.

On Monday, March 11, Frank took to social media in a post on Instagram to share that his hospital stay is due to a surgical procedure that was done on his spine.

Frank shared in the caption of the post the details of the medical procedure. "I wanted to take a moment to update you on my health and share a bit about my recent journey," he wrote.

Per MMA Junkie, Frank signed with the Global Fight League in December 2024. In February, the league announced that Frank was set to go against fellow former UFC fighter Fabricio Werdum, although no date, time, or location was shared.

According to the outlet, Frank last fought back in October 2019, winning unanimously against Roy Nelson, and fans have been eager for his return ever since.

Frank, who began fighting back in 2001, isn't the only professional fighter in the family -- his daughter Isabella Mir made her MMA debut in 2020.