Personally, I don't think it's close; Luke Rockhold getting KO'd by Michael Bisping might still be the answer in 100 years. There's so many issues with it that make it embarrassing -Rockhold completely outclassed him just a year and half prior and was a legitimate champion with a legitimate stoppage of Chris Weidman under his belt. Rockhold also had beaten guys that Bisping couldn't; Jacare and Kennedy. -Bisping never KO'd anybody in the UFC and was pretty clearly a middle of the pack competitor his entire career. -Bisping followed up this performance by struggling mightily with the Ghost of Dan Henderson, furthering the evidence that he didn't have a career resurgence, was not championship caliber, and it was just Rockhold choking. -The title fight was "Earned" via a decision win over Anderson Silva, who just looked pathetic against Derek Brunson I'm honestly shocked Luke Rockhold makes public appearances and even complained about money months ago. This was a loss that should haunt his soul. He should want the third fight for free, and when he wins, he should react like scoring a touchdown while losing 50-0, just complete disgust with himself for having an L on his record to Bisping. At least Matt Serra showed his power was real when he knocked around Karo Parisyan, if people go the GSP-Serra route. Rockhold will never be able to excuse what he allowed to happen. Luke Rockhold getting KO'd by Michael Bisping was basically the equivalent of missing Bucket Number 1 on the Bozo The Clown show.