Hm. The world's record for women in 100 meters, a steroid enhanced time no other woman has come close to since 1988, would be a slow time for a serious high school senior boy, and not even in the top 10000 times for men (seriously, no exaggeration, its beaten that regularly by high school guys, let alone college guys around the world).
The Williams sisters, far more athletic and skilled than Cyborg, lost 6-1 and 6-2 to the 203rd ranked male tennis player (who warmed up by having a beer). They said they might try the 350th ranked man, but never did.
The Canadian national women's hockey team, winners of four Olympic gold medals in a row, practices and loses more often than not against local 15-17 year old boy's hockey teams, who aren't allowed to use body checks or hard physical contact.
The Swedish woman's national soccer team, who won Olympic bronze, practices and loses against 16 year old boys teams.
And you think Cyborg is going to have a chance against full grown men? Seriously? There's a reason there are separate divisions for women in almost every sport. It wouldn't even be close.
Now if you're talking about Cyborg against untrained men, or 95% of the guys on Sherdog, she's winning easily. But against trained men? She'll do worse than the Williams sisters, and they couldn't beat a guy not even in the top 200.
Rousey would do no better, and for the same reason, at UFC 1. And she'd also walk all over most untrained males, and most Sherdog posters.