Uwaga: Tłumaczenia dodatkowych przykładów nie były weryfikowane przez naszych lektorów - mogą zawierać błędy.
He said his research discovered that while boxers have been killed in the ring, no one has died in ultimate fighting.
But the relatively insignificant matter of ultimate fighting posed a rare challenge, he says.
"Many of these guys do the ultimate fighting because it's good money," says Sara Levin.
But the competition, known as ultimate or extreme fighting, is back, and this time its practitioners are protected by more than just mouth guards.
It is impossible to draw a bright line between ultimate fighting and boxing.
If anything, ultimate fighting is safer and less cruel than America's blood sport.
Even as it disappears from public view, ultimate fighting is returning to its roots.
Also, a photo essay on ultimate fighting, the popular, savage spectator sport.
He sent letters to all 50 governors asking them to ban ultimate fighting.
New York state outlawed ultimate fighting, as did other states.