San Francisco has an elite defense. Detroit's defense is somewhat underrated. I don't trust Jared Goff in an outdoor big game even though there won't be bad weather. I don't consider Brock Purdy an elite quarterback. Deebo Samuel could be limited.

Those are my reasons, in a nutshell, why I don't see this rather high total going Over.

The 49ers surrendered the third-fewest points in the league at 17.5. They also have the No. 3 run defense and were sixth in takeaways. San Francisco gave up 21 or fewer points in seven of its last nine games. I seriously question how effective Goff will be on the road against this caliber of defense.

The Lions are tough to run on. They gave up the second-fewest rushing yards and were fourth in causing negative plays. Detroit hasn't yielded more than 24 points during any of its last six games. The Lions held both the Chiefs and Cowboys to just 20 points each when they played them on the road.

Purdy didn't look good against the Packers last week. Many of his throws were not accurate.