Mason (hamstring) rushed two times for 13 yards and a touchdown in Sunday's 37-34 win over Las Vegas.
Mason -- who was limited to special teams due to a hamstring injury last week -- resumed his change-of-pace role behind starter Christian McCaffrey, cashing in one of his two carries for the first touchdown of his career. The undrafted rookie saw significantly fewer touches than he had previously as San Francisco's No. 2 back, but that was likely the result of head coach Kyle Shanahan leaning on McCaffrey in a tight contest. Assuming his hamstring injury is fully healed, Mason could be in line for a larger workload against the Cardinals on Sunday in a matchup the 49ers should be heavily favored in.