In the 165 games in his career, Johnson was successful on 1,737 of 3,392 attempts for 24,410 yards. He totaled 147.9 yds per contest through the air. Johnson passed for 170 touchdowns compared to 181 interceptions. He lost 1,560 yards while being the victim of a QB sack 260 times. His touchdown percentage was 5.0% and his interception rate was 5.3%.
In 0 contests played in his final year, Johnson completed 0 of 0 tries for a total of 0 yards. He averaged 0.0 yds per contest through the air with a 0.0 QB rating. Johnson passed for 0 touchdowns in his last year while giving up 0 interceptions and his longest throw of the year went for 0 yds. He lost 0 yds while being the victim of a QB sack 0 different times. His TD percentage was 0.0% and his interception rate was 0.0%.