Early NFL lines often shift from opener to close—like a -3 favorite moving to...

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

Early NFL lines often shift from opener to close—like a -3 favorite moving to -4.5 by kickoff. Jumping in too soon can mean worse odds and smaller returns