ANALYSIS: We're going to make a percentage play here in this game and back the Under, which has performed well over the first four weeks and has been 8-4 in primetime. The 49ers defense might be the best in the league, and their facing a Rams offense that looks like it hasn't hit its stride yet. On the other side of the ball, Jimmy Garoppolo didn't look like an improvement over Trey Lance in his first start, and he'll have to make do without star left tackle Trent Williams. That's bad news against a solid Rams pass rush. This feels like it'll be more rock fight than shootout, and I don't think both teams get to 20 points.