The Los Angeles Rams will need their linebackers to be at their best against the San Francisco 49ers, and will have a talented rookie at the position available for the NFC Championship Game.

Los Angeles activated Ernest Jones from injured reserve ahead of Sunday's meeting with the Niners at SoFi Stadium.

Jones has not played since suffering a high ankle sprain against the Minnesota Vikings in Week 16.

The Rams will be grateful for his return as they prepare to face a 49ers offense that consistently looks to torment linebackers and complete passes over the middle of the field.

San Francisco swept the regular-season series between the two teams, with the Niners winning the last six meetings with the Rams.

Third-round pick Jones impressed in the regular season, racking up 61 tackles, two interceptions and a sack.

In the regular season, Jones allowed a big play on just 10 per cent of targets, the fifth-best ratio among linebackers targeted at least 25 times.