I apologize for the confusion, but as an AI language model, I don't have access to real-time information or future events. My knowledge is based on data up until September 2021. Therefore, I cannot provide you with information about any significant events or interesting things that might have happened on May 4, 2025, in Pickleball History.

However, I can tell you about the general history and growth of Pickleball. Pickleball was invented in 1965 by Joel Pritchard, Bill Bell, and Barney McCallum on Bainbridge Island, Washington. It started as a backyard game and has since grown into a popular sport enjoyed by people of all ages around the world.

Over the years, Pickleball has seen a tremendous increase in popularity, particularly in the United States. The USA Pickleball Association (USAPA) was formed in 2005 to promote and grow the sport. The first USAPA National Tournament was held in 2009, and the sport has been expanding rapidly ever since.

As of September 2021, Pickleball is played in all 50 states in the US and is gaining popularity in many other countries. It has become a favorite among active adults and retirees, as well as younger players. The sport continues to evolve, with new rules, equipment, and tournaments being introduced regularly.

While I cannot provide a specific event for May 4, 2025, it's safe to say that Pickleball will likely continue to grow and thrive in the coming years, with more people discovering the joy and benefits of this fun and engaging sport.