Very well written essay.
Although you have an excellent groundwork and awesome material-- you have a passion for volleyball, and are obviously succcesful-- I would rework the structure to grab the reader.
You could open the essay talking about your dad. An example...
"From the sidelines of the tournament, I watched my dad spring into the air and spike the volleyball over the net. As his adult league teammates gathered around for congratulatory high-fives, my eyes remained fixed on my father's sweaty face and triumphant smile. Alhough I was only four years old, volleyball had already left a profound impression upon me.
Then, describe your own journey...
Through my childhood years, I dabbled in karate, competed in soccer, and even became lifelong friends with the piano.
"However, my dad's passion for volleyball inspired my own passion for the sport. It was because of him that I developed into a respectable volleyball player at the age of twelve, enabling me to make the Sports Performance Volleyball Club, an aggressive program that competes at the national level..."
So basically... hook to grab attention, then explain your own journey.
Every year, the club would compete at the Junior Olympic National Tournament, the biggest tournament of the year. Besides an assessment of our skill, the tournament is also the ultimate test of the teamwork and perseverance we have developed throughout the season and years past.
This is great, but if your team had any great successes-- defeating a key rival, etc.-- I'd mention that.
The sensation when a group works hard together to achieve one goal and to play a sport that my father has loved are just the reasons why I decided to bring volleyball into my college life. The leadership, teamwork, and discipline involved in this game are all indirectly utilized in my life.
Also very good... reconsider the "indirectly used in my life" portion.
"The leadership, teamwork, and discipline involved in volleyball inspire me to succeed both on and off the court".