Decide who you wish to contact. You can write to an individual, an entire team or a sub-group such as the "O-line" (the offensive line).
Consider what you would like to say in your letter. Congratulate the player or group on a game well played or offer condolences for a loss. Avoid addressing personal issues with a familiar tone. (e.g. Your baby looks just like you. I hope he didn't inherit your fashion sense!) Keep in mind that you do not have a personal relationship with this person. Even well-intentioned comments can cause offense.
Write your letter, then ask friends and family for suggestions and comments.
Make any changes you wish, then finalize the letter.
Go to your player's team website and click on the link to contact players. Each team uses a different link; check "Contact Us," "FAQs," and "Fan Zone."
Follow the instructions to send the letter. While many teams accept emailed fan letters, they recommend hard copies be sent directly to the stadium. Adhere to these guidelines when sending your letter. Improperly addressed or packaged letters are likely to be thrown away.