he made his professional regular season debut in the san francisco 49ers' season-opener at the dallas cowboys and recorded two solo tackles and two pass deflections in their 28–17 victory. on october 13, 2014, johnson made a tackle, a pass deflection, and made his first career interception after picking off a pass attempt by austin davis and returning it for a 20-yard touchdown during a 31–17 win over the st. louis rams. during a week 14 matchup against the oakland raiders, johnson collected a season-high seven combined tackles as the 49ers lost 13–24. on december 14, 2014, he earned his first career start and recorded four combined tackles and deflected a pass in a 7–17 loss at the seattle seahawks. he finished his rookie season with 34 combined tackles (26 solo), six pass deflections, an interception, and a touchdown in three starts and 16 games. the 49ers and coach harbaugh mutually parted ways after they finished with an 8-8 season in 2014.