A Testy Fellow

What NBA player, somewhat known for being a fighter, legally changed his name to Metta World Peace in 9/2011?

Answer: (Drag mouse from left arrow to right)

>  Ron Artest (L.A. Lakers)
Metta is a traditional Buddhist word meaning loving kindness and friendliness toward all.
Mr. World Peace (his full last name, now) was inspired by Chad Ochocinco's name change.   <