 On February 12, 2019, Johnson signed a one-year contract with the Saskatchewan Roughriders for $250,000 CAD, making him one of the highest paid defensive players in the CFL.Johnson missed a few games with injury, and had a slow start to the year while adjusting to the new team and defensive scheme; Johnson did not record his first sack until week 13 during the 2019 edition of the Banjo Bowl.However, it was the beginning of a critical stretch of games for the Riders in which Johnson had three consecutive games with a sack, with four in five games.