Mia Hamm's brother Garrett died from a rare blood disorder less than a year after she won a gold medal in the 1996 Atlanta Olympics. His battle inspired the creation of the Mia Hamm Foundation and its largest annual charity event, the Celebrity Soccer Challenge. (Associated Press)

Mia Hamm's brother Garrett died from a rare blood disorder less than a year after she won a gold medal in the 1996 Atlanta Olympics. His battle inspired the creation of the Mia Hamm Foundation and its largest annual charity event, the Celebrity Soccer Challenge. (Associated Press)