Henderson was scheduled to fight Jon Jones in the main event for the light heavyweight title. After UFC President Dana White couldn't find a new opponent for the champion, he decided to cancel the entire event.
"This is probably one of my all-time lows as being president of the UFC," said White. "For the first time in 11 years, we're going to cancel an event. Dan Henderson has a partial tear in his MCL."
According to White, Chael Sonnen agreed to face Jones on short notice. Jones, however, declined the challenge with just eight days' notice.
White did not hide his disdain for Jones's refusal to fight Sonnen.
"We've never, ever had a fighter refuse to fight someone," claimed White. "As much as he's won and with all the things he's accomplished in a short amount of time, he's been a champion that hasn't been very popular. I don't think this is going to do wonders for his popularity."
With no main event, UFC 151 has been moved from Sept.1 to Sept.22, when UFC 152 was supposed to take place. Ten fights, besides the main event, were cancelled with the decision.
"I don't know what to expect from Jon Jones anymore," said White. "He just selfishly made a terrible decision that affects a lot of people."
Jones is scheduled to fight Lyoto Machida in the main event on Sept.22.