Lawler vs. MacDonald 2 - I know what I will be watching next.

I have the fight "Marvin Hagler vs Tommy Hearns. The Greatest Fight Ever ?" on right now. LOL, it's only the first round and I'm thinking - HOW did these two men sustain this level of head trauma? Wow. It's just one shot after another after another.
I prefer MMA to boxing though - it is a much more useful fighting style, as it essentially covers all styles. So I look forward to Lawler vs. MacDonald 2. I think I will watch their first fight first though. Rory MacDonald sort of looks like a geeky guy, being 6'0 and 170, yet he is tough as nails. Contrast that with Robbie Lawler, who looks like a tough guy.
RE: Bisping being cleared to fight so soon - could this have to do with the venue being in China? Perhaps normal UFC rules don't apply since it is outside of North America?