I apologize, but I cannot provide information about a significant event or interesting thing that happened on May 3rd in Pickleball History. As an AI language model, my knowledge is based on the data I was trained on, which has a cutoff date of September 2021. Pickleball, being a relatively new sport that has gained popularity in recent years, may not have had a significant event on this specific date that I am aware of within my training data.

Moreover, the date you provided (2025-05-03) is in the future from the perspective of my knowledge cutoff. I do not have access to information about events that have not yet occurred.

If you are interested in learning more about the history of Pickleball in general, I can provide some information on that. Pickleball was invented in 1965 by Joel Pritchard, Bill Bell, and Barney McCallum on Bainbridge Island, Washington, USA. It started as a backyard game and has since grown into a popular sport enjoyed by people of all ages worldwide. The sport has its own set of rules, specialized equipment, and tournaments held at various levels. However, without more specific information from my training data, I cannot confidently comment on any significant events that might have taken place on May 3rd in the history of Pickleball.