With three words, Jason Collins changed everything. Collins, who died Tuesday at 47 after battling Stage 4 glioblastoma , made history 13 years ago when he penned a piece in Sports Illustrated in which he came out as gay. “I’m a 34-year-old NBA center. I’m black. And I’m gay,” Collins wrote in the May 6, 2013 issue of the magazine. With that, he became the first openly gay player in the league. Collins came out not long after soccer player Robbie Rogers and WNBA star Britney Griner — who had just been selected No. 1 overall in the draft — came out. Six years earlier, former NBA player John Amaechi had come out four years after his career ended. Jason Collins of the Brooklyn Nets in action against the New York Knicks at Madison Square Garden on April 2, 2014 in New York City.…