Former Strikeforce Champion Nick Diaz did not appear at the UFC 137 press conference yesterday and has apparently "disappeared."

Sherdog.com is reporting:

"After a pair of no-shows at two press conferences on consecutive days, the former Strikeforce welterweight champion has been removed from his UFC 137 showdown with reigning UFC king Georges St. Pierre. In his stead, former WEC titleholder Carlos Condit will challenge St. Pierre.

“Nick Diaz has lost his opportunity at the welterweight championship, and Carlos Condit gets it,” said UFC President Dana White at a Tuesday press conference in Las Vegas, which Diaz failed to attend. “I’ve had my reservations with Nick Diaz for some time now. We haven’t heard from him. He hasn’t returned my calls. When we brought him in to sign to fight Georges, I told him that all purses he’s ever made up won’t add up to as much as he would make in this fight. But I told him I needed him to do certain things. You have to promote the fight. You have to show up for pressers. You can’t start fights at fights.”