World Wide Wiffle Ball Championship
Looks like this event has already taken place.
Sat, Aug 14 – Sun, Aug 15, 2021
14400 Homan Ave, Midlothian, IL 60445
The tournament has hosted thousands of teams over four decades, including at regional stops in Baltimore; Los Angeles; Eugene, Oregon; Chicago; and Barcelona, Spain.
The World Wiffle Ball Championship features five-person teams playing with perforated plastic Wiffle Balls, on miniature ball fields with six-foot home run fences.