Mazzetti is chairman of the Rincon Tribe and lives on the Rincon Reservation. A plea for help. That is what the Rincon Tribe, along with the rest of the tribes in the nation, are making to prevent our …Mazzetti is chairman of the Rincon Tribe and lives on the Rincon Reservation. A plea for help. That is what the Rincon Tribe, along with the rest of the tribes in the nation, are making to prevent our …