Matt Jones did get a touchdown in Week 5, but he averaged less than two yards per carry (11 carries for 20 yards) and did not come out of the game unscathed.
Jones is reportedly dealing with a sprained big toe, with the severity of the injury yet to be determined. It seems we may have seen Jones' 2015 peak already in the Rams game.
His fantasy football stock has been falling over the last few weeks, and it's tough to see him emerging into a reliable fantasy option in the near future. He's still extremely talented, and is getting touches, but owners can't bank on him until we see more production. Stay tuned.