Dustin Johnson and caddie split after lack luster 2011 start

Dustin Johnson is searching for a new caddie, having split with caddie Bobby Brown after nearly three years on TOUR, Golf Digest’s Tim Rosaforte reports.The move is a surprise one, but both sides appear to be in agreement that a change is needed."This part of the game and we both understand that," Brown told Rosaforte on Tuesday. He added that "we are very cool with each other and will remain