Kammala wannan jumla: Mercer ya zama ɗan ƙasar Isra'ila, kuma ya yi aiki a cikin Sojojin Isra'ila na tsawon shekaru biyu. Mercer kuma ya taka leda a kungiyar kwallon kwando ta Isra'ila a gasar cin kofin duniya ta FIBA ta 1986 da kuma
1987 Gasar Kwando ta Turai. A shekara ta 1982, da yake shi Baftist ne a dā, ya koma Yahudanci. Ya ce "Ina tsammanin za ku iya kira ni Bayahude Almasihu ko Bayahude Kirista. A lokacin da nake can can ne na fi kusa da Allah. Ina kare kasar Isra'ila da gaske... " A shekara ta 2006 Ofishin Jakadancin Isra'ila a kudu maso gabashin Amurka ya karrama shi kuma ya zama jakadan kyakkyawar manufa ga Jihar Isra'ila.