Rosenauer created controversy when he chose to play in the 2008 PDC World Darts Championship, having won qualification for the 2008 BDO World Darts Championship. Rosenauer claimed one of the places for the event at the Lakeside, but at the same time, he topped the German Darts Corporation Order of Merit, which grants a place in the PDC World Championship and in the end, he withdrew from the BDO World Championship to play in the PDC version instead. He went on to lose in the first round to Mervyn King.