during a week 10 matchup against at the arizona cardinals, johnson recorded a season-high three combined tackles in the 49ers' 20–23 loss. on january 1, 2017, he collected a season-high four combined tackles and a season-high two pass deflections, as the 49ers lost 23–25 to the seattle seahawks. his production fell under head coach chip kelly and defensive coordinator jim o'neil in and johnson finished the season with 15 combined tackles (11 solo) and three pass deflections in 15 games and zero starts. the san francisco 49ers finished with a 2–14 record and ultimately fired their head coach chip kelly.