can you name any one team that has won this league title?
The Hill School
Mid-Atlantic Prep League
The Hill School won the 2007-2008 MAPL Basketball league regular season championship and year-end tournament championship for the first time in school history. 
who is  finn m. w. caspersen? American financier and philanthropist. where did he study? Peddie School, Brown University, and Harvard Law School. which all sports were entertained in the first one ? Football, Basketball, Tennis, swimming, etc. who are their rivals in the first one? Blair Academy where is it located? Blairstown Township, New Jersey. what facilities do they provide? Bogle Science Center provides laboratories and classrooms, and includes the 100-seat Cowan Auditorium. have they competed in any national or international level competitions? Yes, Mid-Atlantic Prep League. what are the different sport items it includes? Squash does it have basket ball leagues in it? Yes
wiki:15826516
Mid-Atlantic Prep League [SEP] Boys' basketball
The Hill School won the 2007-2008 MAPL Basketball league regular season championship and year-end tournament championship for the first time in school history. After winning the MAPL, Hill lost in overtime to ANC (at one point raked number #1 among prep schools) in the Pennsylvania Independent League Tournament. Hill also won the MAPL Basketball league in 2013-2014. Losing only once in the league to Hun.