Try posting everyday on your Facebook page. Then pay for promoted posts. I know its no fun, but at the same time 5 bucks puts you in front of close to 10,000 eyes. So its worth a shot.
You could also start targeting little leagues around the US. A simple google search will show you tons of little league baseball organizations that would love to have a "film night" in which they show your film to their younger guys. You could even search by teams, so that individual teams could show the film and gain more love for the sport.
CrowdFund GeniusFor any other questions ask me on Facebook -
http://on.fb.me/12lZ2SW