Compete in all 4 and receive...
Tournament Discounts
National WIFFLE® Grand Slam Champions:
Out of gallery
2021 Event Dates
Hometown Cup: July 23-25, New Carlisle, IN
GSWL Yard Open: August 21-22, Staten Island, NY
NWLA Tournament: September 17-19, Indianapolis, IN
United Wiffleball: October 22-24, York, PA
Tournament Registration Links
Register for all four events before July 15th deadline to receive tournament discounts.
Grand Slam Memorabilia
Name in the history books!
National WIFFLE® Grand Slam Participants:
Past Winners