Not U13 according to US Lacrosse:

2016-17 US Lacrosse Player Segments

For play occurring between September 1, 2016 - August 31, 2017​

Youth

Date of Birth Age Group Grade Affiliation
Born 9/1/2009 through 8/31/2010 7U 1st
Born 9/1/2008 through 8/31/2009 8U 2nd
Born 9/1/2007 through 8/31/2008 9U 3rd
Born 9/1/2006 through 8/31/2007 10U 4th
Born 9/1/2005 through 8/31/2006 11U 5th
Born 9/1/2004 through 8/31/2005 12U 6th
Born 9/1/2003 through 8/31/2004 13U 7th
Born 9/1/2002 through 8/31/2003 14U 8th