I apologize for the confusion, but as an AI language model, I don't have access to real-time information or events beyond my knowledge cutoff date of September 2021. Additionally, while pickleball has gained popularity in recent years, it is still a relatively new sport, and its history is not as extensively documented as other sports.

That being said, I don't have any specific information about a significant event or interesting occurrence in pickleball history on May 10th. Pickleball, as a sport, was invented in 1965 by Joel Pritchard, Bill Bell, and Barney McCallum on Bainbridge Island, Washington, USA. Since then, it has grown in popularity, particularly among older adults, as it offers a fun, social, and low-impact way to stay active.

If any notable pickleball events or milestones occurred on May 10th in the future, they would likely be related to tournaments, championships, or perhaps the introduction of new rules or equipment innovations. However, without access to information from the future, I cannot provide any specific details.

I apologize for not being able to provide a more detailed or entertaining response, but I hope this general information about the history and growth of pickleball is still helpful.