(Adds details, reaction) By Simon Evans MIAMI, Feb 15 (Reuters) - United States international Robbie Rogers has come out as gay and says he is stepping away from soccer. The 25-year-old, who recently played in England for Leeds United and Stevenage and has 18 caps for the U.S. team, wrote on his website - under the title "The Next Chapter" - that he had been afraid to raise the issue. There are no openly gay players playing in Major League Soccer or in the English professional leagues.