UNTERFÖHRING (dpa-AFX) - Alexander Rosner is leaving ProSiebenSat.1 to join Sky. The 55-year-old sports journalist will become editor-in-chief at the pay-TV broadcaster in September, Sky announced Tuesday. Rosner previously also worked for Sport1 and was most recently responsible for sports broadcasts, sports production and rights acquisition at ProSiebenSat.1's TV stations for around ten years. He was largely responsible for coverage of the NFL, the rights to which will be held by RTL from the new season./mrs/DP/ngu