Early NFL lines often shift a full point or more—like a spread opening at -3...

https://wiki-net.win/index.php/How_Do_Season_Win_Totals_Move_from_May_to_September%3F

Early NFL lines often shift a full point or more—like a spread opening at -3 and closing at -4.5—because sharp money usually waits. Jumping in too soon means you’re paying for info you don’t have yet