Big League WIFFLE Ball (BLW) is America's first professional wiffle ball league. BLW started as a backyard wiffle ball league, with just four teams, during the COVID-19 pandemic. The ensuing fall, BLW announced what's now one of the largest tournaments in the country, the Western WIFFLE Ball Classic at Scottsdale Stadium.

From 2020-2025, BLW held a backyard league every summer, hosted major tournaments throughout Arizona, saw an enormous rise in social media following, and played a World Series at AT&T Stadium.

In the fall of 2025, BLW launched America's first professional wiffle ball league. The 2025-26 season featured 10 city-based franchises competing in four regional tournaments (Scottsdale, Chicago, Los Angeles, and Dallas) from October to March. Individuals such as Kevin Costner, Gary Vaynerchuk, David Adelman, Marc Lasry, David Blitzer, and even Dude Perfect purchased teams.

This summer, BLW returns for its second professional season. All regular-season and playoff games will be played in Atlanta, Georgia, with an All-Star Game in St. Louis and the World Series in Orlando. The season kicks off Sunday, June 7th, and runs through August, featuring weekly Sunday game days with live broadcasts on ESPN+ and ESPN2. Ten franchises will battle it out across afternoon and evening slates in the most lively and fun environment in wiffle ball history.