I am in Cypress, TX, in cy-fair school district, and my 12 year old wants to play baseball. Does anyone know where he can sign up and when the fall registration would be?

One option is Cy-Fair Sports Association

Looks like Fall Baseball registration is underway and can be done online at;

http://www.cy-fairsports.org/index.cfm?S...

or in person at least through early September.

There are also some Official Little League Baseball leagues in Northwest Houston. Not sure which is closest to you and if/when they are offering Fall baseball.

Parkwood National
http://eteamz.active.com/parkwood/index....

Northside National
http://eteamz.active.com/northsidenation...

Northwest National
(can't find website)

Many leagues will post signs or bulletins around the community. Some will have registration announcements in the local newspaper. Most often, these notices will have contact information for the local Little League

Check the website for the school district. I'm sure they'll have something posted there....if not, have him ask his teacher and they can find out.