High School Summer League The New Jersey Amateur Baseball Congress Summer High School League consists of the following Divisions.  Ken Griffie Jr. 15U Division, the Mickey Mantle 16U Division, the Connie Mack 18U Division and the New Jersey / Rockland County Select Baseball League (NJSBL / Wood Bat League).   Ken Griffie 15U Division. This division is for your freshman team.  It is also a good league for your incoming freshman players.   This along with our fall programs are good tools for the development of your young players. Mickey Mantle 16U Division.  This division is for your Junior Varsity Team.  There is also a fall league for this division. Connie Mack 18U Division.  This division is for your advanced Junior Varsity and Varsity Players.  There is also a fall league for this division. New Jersey / Rockland County Select Baseball League.   This division is a wood bat league for 15, 16, 17 and 18 year old Blue Chip Players that are college or Pro prospects. Teams throughout New Jersey and Rockland County will participate in this very competitive highly visible division.     Our High School Summer Leagues for Ken Griffie Jr. (15U), Mickey Mantle (16U), Connie Mack (18U) and the NJSBL start on or about June 1 and end on about July 15.  The post season can go to the end of the month and possibly into the first week of August (Optional) All our divisions have a regular season with teams having a chance to advance to post season play on a State, Regional and National basis.  Contact Bob Frustaci for additional information or click on the league to link to our web site.