Get the latest news and updates on Tierrasanta Little League baseball Tierrasanta Little League is organized and operated exclusively to provide instruction or training of the individual for the purpose of improving or developing their capabilities. All child development baseball activities are run by volunteers and are adult-supervised. We serve 300+ children annually in the Tierrasanta and Murphy Canyon communities of San Diego, CA. Little League Baseball, Incorporated (Little League International) has been declared exempt from taxation by notification from the Deputy Commissioner of the Internal Revenue Service.