Originally posted on 09/01/2013:

The psychological factor that I noticed is that when a fighter who talks trash before a fight, are most likely to lose their fights.

Chael Sonnen talked trash to Anderson Silva. Sonnen lost both fights.
Dave Herman talked trash to Antonio Nogueira. Herman lost the fight.
Alistair Overeem talked trash to Antonio Silva. Overeem lost the fight.
Nick Diaz talked trash to GSP. Diaz lost the fight.

Maybe it's a just coincidence.