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

https://casinocrowd.com/is-it-dumb-to-bet-a-line-after-it-moves-from-3-to-4-5/

Early NFL lines often shift a full point or more, like a favorite opening at -3 and closing at -4.5. Chasing these early numbers usually means losing value