The following is an article from WrestlingObserver.com:
Griffin out of England UFC
by Dave Meltzer
The UFC injury woes in the last week continued with Forrest Griffin having to pull out of his UFC 70 match on 4/21 in Manchester, England with Lyoto Machida.
Griffin is suffering from a staph infection in his knee. UFC attempted to get both Keith Jardine and Jason Lambert as replacements. Jardine is out with a shoulder injury, and Lambert is still hurting from his 3/3 match with Renato Sobral that he ended up winning. At this point they are still looking for a new opponent for Machida for the show that airs on Spike TV.