Forrest Griffin latest UFC 155er to fall to injury

The hits just keep on comin'. UFC president Dana White tweeted today that Forrest Griffin injured his knee.

Griffin was scheduled to fight Phil Davis at UFC 155 at the end of the month. Originally, he was supposed to fight Chael Sonnen, but Sonnen was then matched up with UFC light heavyweight champion Jon Jones for a bout after their stints coaching on "The Ultimate Fighter." Davis stepped in, but now Griffin is apparently out.

UFC 155 is headlined by heavyweight champion Junior dos Santos' rematch with former champ Cain Velasquez. The card took a hit recently when Chris Weidman was forced out of his bout with Tim Boetsch because of injury. But strong cards being decimated by injuries for has been par for the course for the UFC in 2012.