updated 9:52 a.m. ET Sept. 21, 2005

LAS VEGAS - The news conference afterward was filled with the usual congratulations for the winners and talk about bigger things to come. Oscar De La Hoya was the promoter and he answered questions in two languages, thanked all for coming and declared the night a success.

Outside, HBO was hosting a poolside party at the MGM Grand hotel-casino for those lucky enough to get an invite. There was plenty of food, drink and laughter for the fight crowd.

Spirits weren’t so high in a hospital not far from the glittering Las Vegas Strip. There, Leavander Johnson lay in the intensive care unit, his doctor unsure he would survive the night.

This was the dark side of boxing, the one that fans who pay $500 to sit ringside never see.

Johnson had hoped to end the biggest night of his boxing life with the IBF lightweight title belt still around his waist. He might have even enjoyed himself at the HBO party afterward.

Instead, he was in a deep coma that doctors induced to try to save his life.

“He was fighting for a world title, then a few minutes later here he is fighting for his life,” said Johnson’s father, Bill, who also is his trainer.

Johnson said his son knew the risks. He had been fighting for money for 16 years, and understood that taking punches to the head could be dangerous.

Unfortunately, as Mike Tyson likes to say, boxing is a hurt business.

But it shouldn’t hurt this bad.

Johnson left the ring upright, not knowing that a blood clot was beginning to form, eventually swelling so much it moved his brain from the right side of his skull to the left. When his left leg began dragging on the way to the dressing room, though, it was clear something was terribly wrong.

The doctors of the Nevada Athletic Commission acted quickly. In the space of 40 minutes, they got him to the hospital and then into surgery. A surgeon took out a piece of his skull, and left it open so his brain would have room to swell.

The problem is, his injury is not an isolated one.

Four times in the last four months in Las Vegas, boxers have left the ring bleeding in the brain. One is dead; two others survived.

It’s scary, but also puzzling. It might be a statistical anomaly, but doctors can’t say. They just don’t know enough about why some fighters are injured while others can spend a career getting hit in the head and show no ill effects.

MORE FROM BOXING

Doctor says boxer should survive brain injury

Doctor says boxer should survive brain injury Rising N.Y. boxer charged with helping run drug ring Klitschko stops Thompson, retain heavyweight title Holyfield ironing out finances, avoids jail time De La Hoya to put muscle behind USA Boxing Images: A look at Oscar De La Hoya's career Opinion: ‘Rocky’, ‘Hoosiers’ lead top 10 sports movies Boxing news and other features   Add Boxing headlines to your news reader: