49ers' Joe Williams: Scores touchdown Thursday

Williams carried the ball 11 times for 27 yards and a touchdown in Thursday's preseason win over Dallas. He also secured two of three targets for 15 yards.

Williams didn't have a strong game from a yards-per-carry standpoint, but he has received positive reviews in camp for an improved work ethic following a disappointing rookie season. The 24-year-old has been competing with Raheem Mostert for No. 3 on the 49ers' depth chart, but Matt Breida's shoulder injury could turn it into a battle for the primary backup role if the latter is forced to miss extended time.