The Balls were all over the place in Lithuania on Tuesday ... with LaMelo and LiAngelo combining for a whoppin' 80 POINTS in LaVar's pro coaching debut.

BC Vytautas announced Papa Ball would join it's coaching staff for the 4th game of the Big Baller Brand Challenge against Alytaus Dzūkija ... and the strategy worked, 'cause he helped coach the team to a 147-142 win.

Not only did Melo drop 43 points (including 5 straight 3 pointers in the 3rd quarter and a fast break dunk), but Gelo added 37 of his own to secure the dub.