Use your book, Writing Source 2000, for directions on how to write a business letter. Use the school address for your return address.
In the first paragraph tell the player who you are and why are you writing. Feel free to mention the San Jose CyberRays and SJSU Womens' soccer team in your letter.
Feel free to ask for their autograph and photograph.

Don't forget your closing and to use your best handwriting and to sign your full name.

Letter Writing Tips

Keep your letter short and to the point of what you want to say.
Start it with an interesting sentence to catch your reader's attention.