Milos Maric, played for Zeta but he is from Serbia and began his career in Uzice.
Then we have several players whose origins are from Montenegro, but never played in Montenegro. Dragoslav Jevric (born in Berane) started his career in Pristina. I think that Goran Djorovic has roots in Montenegro but he was born and started his career in Pristina. Ditto for the captain of the U-21, Marko Perovic.
Boskovic and Kralj have not played for the NT for a while. If you count those who played at the time Kralj was a NT member and those that have earned a cap or two in friendlies (for the senior or U21 NT), then Nisa Saveljic, Branko Brnovic, Dragan Bogavac, Ognjanovic, Ardijan Djokaj, Mitar Pekovic, another Boskovic (from Sutjeska), Vukasin Poleksic, Zoran Banovic, etc. should be counted in. All of them began their careers in Montenegrin clubs.