Lexi Thompson, and one of the most popular players on the LPGA Tour, decided Tuesday this will be her last year playing a full schedule. Thompson chose the US Women's Open—the major she first played when she was 12—to announce that she will step away at the end of the year. The 29-year-old American became emotional while talking about the amount of work no one sees and the loneliness she has faced. Thompson said she has contemplated semi-retirement the past few years and cited mental health as one of the factors that contributed to her decision, the AP reports.