Johnston tallied three receptions on five targets for 38 yards in Sunday's 22-10 win over the Raiders.
Johnston was actually the team's leading receiver heading into the fourth quarter, but two of his catches were first-read looks for minimal yards and his longest, a 16-yard reception, came on a shallow crossing route with the defense stationed way back to prevent a third-and-long conversion. It's at least encouraging that quarterback Justin Herbert trusted Johnston on the designed looks given the second-year receiver's struggles in his rookie year, but it'll be interesting to see if Joshua Palmer and Ladd McConkey continue to generate more opportunities as the season progresses.