Just in case you need a refresher course on why Carlos Condit was tabbed as a replacement for Nick Diaz, the UFC released a brand new promotional trailer just shortly after announcing that "The Natural Born Killer" would now be stepping in to challenge Georges St. Pierre for the Welterweight title. 

GSP vs. Condit will headline the stacked UFC 137 fight card, set to talk place October 29th from the Mandalay Bay Events Center in Las Vegas, Nevada. Photo: Francis Specker

Further Reading: GSP sharpens his stand-up ahead of UFC 137