Why I think it was fixed.
1. Pac hasn't been knocked down since that tall Mexican beat him like 8 years + or whatever.
2. Marquez has never knocked anyone down like this!
3. Punch was hit in his face, not at the end of the punch (not full power).
4. We havent' seen anyone get knocked out this badly since Martinez v Williams. And Williams didn't do an interview after... as I recall. Pac does a pretty coherent one.
...Maybe I'm biased....