I apologize, but I couldn't find any significant events or interesting things that happened on February 25th in the history of pickleball. Pickleball is a relatively new sport that was invented in 1965, and while it has grown in popularity over the years, there isn't a comprehensive record of events or milestones that occurred on specific dates.

However, I can tell you a bit about the history of pickleball in general. The game was created on Bainbridge Island, Washington, by three fathers - Joel Pritchard, Bill Bell, and Barney McCallum - who were looking for a way to entertain their bored children during the summer. They improvised with a badminton court, ping-pong paddles, and a perforated plastic ball, and the game quickly caught on among their friends and neighbors.

The name "pickleball" has an interesting origin story as well. According to Joel Pritchard's wife, Joan, she started calling the game pickleball because "the combination of different sports reminded me of the pickle boat in crew where oarsmen were chosen from the leftovers of other boats." However, Barney McCallum claims that the game was named after the Pritchards' dog, Pickles, who would chase after the ball and run off with it.

Over the years, the game has evolved and grown in popularity, particularly among older adults looking for a low-impact way to stay active. In 1984, the United States Amateur Pickleball Association (USAPA) was founded to promote the sport, and in 2001, the first USAPA National Tournament was held in Buckeye, Arizona.

Today, pickleball is played by millions of people around the world, with tournaments and leagues popping up in communities everywhere. While I couldn't find any specific events that happened on February 25th, the history and growth of pickleball is an interesting story in itself.