Raiders have surrendered the worst passer rating per game in the league this year at 103.4. So things were aligned for Baker to have a nice confidence builder game, and that's not to take away from what he did. Because he really did play great.
Packers are quite a bit better at 92.8 which is still almost bottom third but that plus the weather plus the Rams secondary being torched by Rodgers will probably be too much for Baker. I expect we'll fall behind and the Packers will tee off on our OL.
By the way speaking of passer rating against KC is second worst. That's a real bad stat to have going into the playoffs no matter how good your offense is.