From AllEars:
TRANSPORTATION -- Bus transportation to ESPN Wide World of Sports is available from Disney's All-Star Resorts, Disney's Caribbean Beach Resort and Disney's Pop Century Resort on a limited schedule: Thursday - Monday 5 - 11 p.m. These buses will also run when events are taking place at the Sports Complex one hour prior to Sports Complex opening until 11 p.m. or Sports Complex close, whichever is later.
During the scheduled operating hours, buses from Disney's All-Star Resorts, Disney's Caribbean Beach Resort and Disney's Pop Century Resort to ESPN Wide World of Sports will arrive at the Sports Complex on the hour and half-hour