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
Jared Goff u280.5 passing yards -120 (PointBet)
Teddy Bridgewater o220.5 passing yards -125 (BetMGM)
Justin Fields u76.5 rushing yards -114 (FanDuel)
Tyler Allgeier u75.5 rushing yards -115 (BetMGM)
Saquon Barkley u80.5 rushing yards -114 (FanDuel)
Miles Sanders u80.5 rushing yards -115 (PointBet)
David Montgomery u60.5 rushing yards -120 (PointBet)
Jerrick McKinnon u33.5 receiving yards -115 (BetMGM)
Amon-Ra. St Brown u85.5 receiving yards -115 (PointBet)
Rachaad White u2.5 receptions +126 (FanDuel)
Mike Evans o4.5 receptions +110 (DraftKings)
JuJu Smith-Schuster o5.5 receptions +118 (FanDuel)
Sunday 4PM Slate
Jarrett Stidham o195.5 passing yards -115 (PointBet)
Justin Herbert u285.5 passing yards -115 (DraftKings)
Justin Jefferson o7.5 receptions +130 (FanDuel)
Sunday Night Football
Kenny Pickett o190.5 passing yards -115 (PointBet)
Monday Night Football
Josh Allen u48.5 rushing yards -114 (FanDuel)