Joe ‘Diesel’ Riggs has now confirmed that he is out of UFC 52. He was slated to take on David ‘The Crow’ Loiseau. Riggs established a nasty cut after colliding heads with a training partner according to Riggs, who revealed this on MMA Weekly Radio today. No news on a replacement yet. Speculation suggests that the UFC may just drop Loiseau from the card all together, but their has been emails to Zuffa from several other middleweights offering to fill in.