The San Francisco 49ers travel to Los Angeles on Thursday night hoping an injury-riddled offense can hold up against the Rams’ ninth-ranked defense. Jones injured a knee during Week 3 but is now healthy and was a full practice participant all week. INJURY REPORTAlong with Jennings, Pearsall and Watkins, 49ers defensive end Robert Beal Jr. (ankle) also was declared out after not practicing this week. San Francisco defensive lineman CJ West (thumb) is questionable. PREDICTIONSan Francisco enters with the league’s sixth-ranked defense, but 2.0 of the team’s 5.0 sacks to date have come from now-injured defensive end Nick Bosa.