It's just a single pre-season game, let's not over-react.
Actually I like betting on preseason games because I don't need to analyze it carefully since I observed that the underdog and the over usually hit. (this tip is for bettors, and I believe most of us here are betting as well).
Are there any lines open for pre-season betting in any sports betting website?
You can check sportsbet.io and see for yourself. I mean, try doing some research on your own and avoid asking questions which you can find answer for yourself.