On Sunday fans of youth baseball in El Dorardo Hills and neighboring communities will have an opportunity to see three of the top 11-and-under teams in Northern California compete in a round-robin tournament hosted by Sierra Valley Storm. The Lamorinda Naturals, ranked No. 1 among tournament baseball teams, and the Backyard Blaze, ranked sixth, will join the Sierra Valley Storm, winners of the 2010 North Region PONY All-Stars, at Promontory Field. Games will start at 10 a.m., and continue throughout the afternoon. In the past,the Storm have fared well against this level of competition and it should be an exciting day of well played youth baseball.