Joshua Karty kicked a go-ahead 27-yard field goal with 9:28 remaining and Darious Williams came down with a crucial interception to lift the Los Angeles Rams to a 12-6 win over the San Francisco 49ers on Thursday night in Santa Clara, Calif. Heavy rain before halftime prevented both teams from finding an offensive rhythm, but Los Angeles (8-6) did just enough to earn its seventh win in nine games. With the game tied at 6, it looked as if the Rams were headed for the end zone after Puka Nacua got behind San Francisco's secondary and hauled in a 51-yard pass from Matthew Stafford early in the fourth quarter.