When a math total has a large enough difference to the posted total, we use the oddsmakers knowledge against them. Because we store each over and under differently in each sport, the over and under angles will have different records, but in reality one could combine them for an overall record. The under version goes under at a rate of +347.7. When it is a day-game following a high-scoring night game, it goes under at a 10.1 percent ROI.