http://iscoresports.com/

Our season has ended and the after season series will start in two days.
I will create a new league call VETERANS 2015 SERIES with all the stats back to " 0 ", and,
I would like to keep the same roster for each team... how can I proceed without having to re-create the roster for each team for this " NEW LEAGUE "?

If you use the same teams and just use leagues when filtering stats, then you do not need to create new rosters. See the following for information on using leagues in iScore:

http://iscoresports.com/manual/#h.2645an2iuahn