At some point in their career most fighters will face someone who is undefeated. If they win it is said they stole their "O." But who has stolen the most O's? I really don't know so I'll just pick a great fighter and see how many they stole and you see if you can find someone with more. And so on and so forth:
K Sakuraba stole 5
Royler Gracie
Royce Gracie
Ryan Gracie
Andrews Nakahara
Rubin Williams
K Sakuraba stole 5
Royler Gracie
Royce Gracie
Ryan Gracie
Andrews Nakahara
Rubin Williams