Houston 5A Baseball...http://www.hometeamsonline.com/teams/?u=H5AB&s=baseball...
I know it's primarily HS focused, but go to message boards to post your question. Also, google for specific teams, like Houston Banditos, Houston Heat, Columbia Angels, South Texas Sliders, etc...then there is Premier Baseball & a few other Leagues...
Hope that helps & good luck to your son!!