I played Under 8.5 -140 about a week ago. I figured that win total was with Rodgers at QB, I thought maybe the juice moves a little, but I didn't think it would go to 9. But I also thought there was a chance he wouldn't sign with them and remain a FA in hopes that a team's QB goes down during the season, in that case the win total would have dropped bigly, no way they're using 8.5 with a QB room of Mason Rudolph and Skylar Thompson, and my bet would have had really nice value. Ideally he wouldn't have signed with Pittsburgh, but my play was with the thought that he would.
I have four outs and just checked them, two of them took it off the board, the other two are using the same 8.5 with the same juice. If any of them go 9 then I made a mistake, but it's my opinion that the 8.5's that have been available were assuming Rodgers was their QB