The bets are determined by checking a wide variety of projections against my own knowledge of how players will be utilized given game context. The player prop lines were taken from this site.
When analyzing projections from fantasy sites, you'll often find that the projections are higher than betting lines, which will make you bet shit tons of overs. This is a common mistake. The projections are mean based, while the betting lines are median. Mean projections tend to skew higher because the range of outcomes are not evenly distributed. (i.e., a running back on a good day could go for over 100 yards, but he would never go under 0... hopefully). If you find a mean projection lower than the Vegas line, the under is likely a good bet. To bet an over, the mean projection should be significantly higher. All bets below will follow that logic.
Saturday Slate
Josh Allen o22.5 completions +105 (PointBet)
Sunday 1PM Slate
Case Keenum u207.5 passing yards -110 (Bet365)
Chuba Hubbard u72.5 rushing yards -110 (Bet365)
Romeo Doubs u45.5 rushing yards -115 (PointBet)
Dontayvion Wicks u4.5 receptions +102 (FanDuel)
Sunday 4PM Slate
Dak Prescott u277.5 passing yards -110 (Bet365)
D'Onta Foreman u39.5 rushing yards -115 (BetMGM)
De'Von Achane u47.5 rushing yards -110 (Bet365)
Sunday Night Football
Bailey Zappe o183.5 passing yards -110 (Bet365)
Monday Slate
Tommy DeVito o180.5 passing yards -120 (PointBet)