Do you have a preschooler?! Have them learn the baseball basics from our Sioux Falls Post 15 Sr. Legion players during our Rookies Program in June. Rookies play on the 4 Mondays in June. Enjoy a PIZZA PARTY on the last day after you play a fun game of baseball with your friends. Rookies West Side and Rookies East Side are now taking registrations. Register online today and PLAY BALL SIOUX FALLS!