Pre-Register for Free for the 2012-2005 Age Groups for the Rio Rapids SC Boys ECNL tryouts. ALL players registered with any USYS Clubs are allowed to attend the ECNL tryout. If you are registered with Rush ECNL you are not allowed to try out at this time. 2005, 2006, 2007, 2008, and 2009 1:30-2:45 PM 2010, 2011, and 2012 3:00-4:00 PM