I don't believe the buses run from DHS to WWOS anymore.
Here's is what the WWOS website says regarding transportation:
TRANSPORTATION
All guests are responsible for providing their own transportation to and from the ESPN Wide World of Sports® Complex and other event competition venues unless special transportation has been arranged specifically for your event.
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 5:00 p.m. to 11:00 p.m.
These buses will also run when events are taking place at the Sports Complex based on the following schedule:
One (1) hour prior to Sports Complex opening until 11:00 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 ½ hour.
Due to capacities and schedules, these buses may not be able to accommodate teams and equipment. To ensure your team's on-time arrival for competition at ESPN Wide World of Sports®, please use event transportation if it is included with your event, or make arrangements for your own transportation to the Sports Complex.
If I were you I would take a cab and save yourself a lot of time and aggravation. Fare should be approx $12 plus tip and take approx 10 minutes, it's only a little over 4 miles.