Retton, who won the Olympic individual all-around gold medal at the 1984 games, is battling a "very rare form of pneumonia," her daughter wrote on a fundraising page.Mary Lou Retton, a former Olympic gymnast, is “fighting for her life” in the intensive care unit with pneumonia, her daughter McKenna Kelley said. Kelley shared the news on her Instagram Story Tuesday as well as a link to a Spotfund page dedicated to her mom. In a message on the fundraising page, Retton’s daughters wrote, “My amazing mom, Mary Lou, has a very rare form of pneumonia and is fighting for her...