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, which 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.
Sunday 1PM Slate
Desmond Ridder o165.5 passing yards -113 (FanDuel)
Justin Fields o154.5 passing yards -113 (FanDuel)
Zach Wilson o196.5 passing yards -113 (FanDuel)
Isiah Pacheco u70.5 rushing yards -120 (PointBet)
D'Andre Swift u27.5 receiving yards -115 (BetMGM)
Sunday 4PM Slate
Justin Herbert u303.5 passing yards -115 (BetMGM)
Davante Adams o6.5 receptions +110 (FanDuel)
Keenan Allen o6.5 receptions +110 (FanDuel)
Marquise Brown u4.5 receptions +125 (BetMGM)
Sunday Night Football
Brian Robinson o64.5 rushing yards -115 (BetMGM)
Monday Night Football
Cam Akers u55.5 rushing yards -114 (FanDuel)
Ben Skowronek o29.5 receiving yards -115 (Caesars)