Strikeforce veteran Roger Gracie has announced that he is changing weight classes from light heavyweight to middleweight. Gracie is coming off of a loss to King Mo at a Strikeforce event this past September, his last fight at light heavyweight. Roger Gracie also announced that he is joining Team Black House, which is home to such fighters as UFC Middleweight Champion Anderson Silva, Lyoto Machida, Antonio Rogerio Nogueira and Antonio Rodrigo Nogueira. No date has been set yet for Gracie’s middleweight debut in Strikeforce, whose next event is May 19th.