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.

The 49ers' defense soon got a stop on third-and-2, though, forcing Los Angeles to bring out Karty for his 27-yarder.

San Francisco (6-8) quickly worked down to the Los Angeles 33 on its ensuing drive. Brock Purdy proceeded to throw a deep ball near the near-side pylon that Williams picked off, and Karty later made good on a 29-yard field goal with 18 seconds to go.

Although a horse-collar tackle on the following kickoff set the Niners up at the 50-yard line, they couldn't generate a miracle in the final seconds.

Stafford completed 16 of 27 passes for 160 yards, with Nacua (seven catches, 97 yards) serving as his favorite target. Kyren Williams was a workhorse on the ground, going for 108 yards on 29 carries.

Star receiver Cooper Kupp didn't have a single reception for the Rams.

Purdy finished 14 of 31 for 142 yards and the interception. Isaac Guerendo had 16 carries for 57 yards as San Francisco got outgained 302-191 in total yards.

Jake Moody and Karty exchanged second-half field goals within a span of just under 10 minutes to forge the 6-6 tie.

Amid the rain, San Francisco punted on six of its seven first-half drives.

The 49ers' only successful drive before the break ended with Moody's 53-yard field goal with 10:01 left in the first quarter. A 33-yard completion to George Kittle over the middle helped set up the kick.

After punting on its five first drives of the game, Los Angeles finally tied the contest with 65 seconds remaining in the first half on a 48-yard field goal from Karty.

The Rams climbed within a half-game of the first-place Seattle Seahawks (8-5) in the NFC West. The defending conference champion 49ers are last in the division, a half-game behind the Arizona Cardinals (6-7).

--Field Level Media