Editor's Note: This story initially ran ahead of UFC 220 in January.

In the heavyweight division, it only takes one punch to become champion. Stipe Miocic proved that in 2016 when his right hook knocked out Fabricio Werdum in front of more than 45,000 people in Curitiba, Brazil.

The scene was magical. Miocic immediately jumped over the cage and into the arms of his team. Moments later he was presented with the UFC's heavyweight title belt.

Miocic was on top of the world. And a few days later he was scrubbing toilets.

"That's the big one," says Jamie Meklemburg, a close friend and fellow firefighter in Cleveland. "We make sure that his first shift after his fights, he knows we're going to have him clean the toilets. He's tried to avoid it, but we save that for him."

When Miocic isn't the "baddest man on the planet," he works part-time at the Valley View Fire Department in Cleveland. This requires at least 12 hours a week devoted to everything from putting out fires to helping resuscitate someone who has gone unconscious. Less than two weeks away from arguably the biggest fight of his life -- a title bout against Francis Ngannou at UFC 220 in Boston on January 20 -- Miocic worked a shift from 7:30 p.m. until 7:30 a.m.

His primary task, according to Fire Chief Ken Papesh, is as a paramedic working on medical calls. When not doing this, he's helping to make sure equipment is working properly and ready to go when needed. "Unfortunately it seems like a more junior-level role," Papesh says, "But it's probably the most important role in the station."

Miocic first came into the station around 2010 after 18 months of school and eight weeks of training. His jovial personality stood out immediately, and since that time little has changed. "He's a goof," Papesh says. "He was as genuine as a guy then as is he now. All of this fame and celebrity, he is still the same guy that walked into the station and met me. He's salt of the earth."

Stipe Miocic has worked part-time with the Valley View Fire Department since 2010. Courtesy of Ken Papesh

Papesh has worked closely with him over the past eight years, but one story stands out.

Less than a year into Miocic's time as a firefighter, he responded to a call from a woman complaining about chest pain. He and another firefighter visited her at work to check on the situation, but when they reached the office she said she felt better and no longer needed to go to the hospital. Miocic would have none of it.

He convinced the woman to at least get it checked out. Miocic sat in the back of the ambulance with her on the way to the hospital -- and then she went into cardiac arrest.

"Stipe said her name and she didn't answer," Papesh says. "And he looked at the monitor and was like 'oh my gosh.' He started CPR on her and got the defibrillator and shocked her to get her back. She ended up having open heart surgery and was able to leave the hospital fully mentally and physically intact because of what he did."

Miocic quite possibly saved her life that day.