Earlier this month Forrest Griffin was forced to drop out of a planned co-main event fight with Phil Davis at UFC 155 on Sat., Dec. 29, 2012, at the MGM Grand Garden Arena in Las Vegas, Nevada.
The cause was an MCL tear and ACL strain, which don't sound that bad unless you have had it or seen it.
But now everyone has seen it, as Forrest tweeted an image of the knee. And it is that bad.
Forrest Griffin @ForrestGriffin
This is what you get for christmas when your naughty