More than a few San Francisco 49ers acknowledged they didn't know a whole lot about many of the unsung players going against them for the rebuilding Los Angeles Rams. The Niners learned a bit more than they wanted to know Sunday while the Rams forced the Super Bowl contenders to dig deep to extend their remarkable winning streak in this rivalry. Brock Purdy passed for 206 yards and ran for an early touchdown, Deebo Samuel rushed for an 11-yard TD with 11:28 left and San Francisco hung on for its ninth consecutive regular-season win over Los Angeles, 30-23.