According to answers.com, Reyes lives in Manhasset, New York. You can contact him courtesy of the New York Mets: Jose Reyes
New York Mets
123-01 Roosevelt Ave
Flushing, NY 11368-1699
USA To request an autograph if you are in the US, send a self-addressed envelope (at least 8.5" x 4" in size) with sufficient postage with your request letter and a photo. You may include a piece of cardboard to keep the photo from bending during shipping and also write "Do Not Bend" on the envelope. There is typically over a 3 month wait for a response.
If you don't live in the United States, add several International Reply Coupons. International Reply Coupons (IRC) are used by the receiver to purchase US stamps. You can only get them at your post office. Place the IRCs inside the envelope, not on it.