A teammate of Parade All-American tailback Enrique Davis, who signed with Auburn on Wednesday, the linebacker is a strong player, according to Mosley High head coach Perry Brown, who is in his second season at Mosley.
"He is another one like Enrique," Brown says. "He has got all of the tools. He is probably 6-2, 195 pounds. He can do a lot of things.
Carlton played quarterback as a freshman, I think," the coach says. "We probably would have played him at quarterback, but playing mike linebacker, and with all of the things we needed to do on defense, I used him on defense and as a spare running back.
"He can catch the ball, he can throw the ball. He is a great tackler. He has real good speed and strength. He can do it all. He is definitely a Division I player."
Rated a three-star prospect by Scout.com, the biggest question about Johnson is his academic status. He could be a sign to place prospect for the Tigers.
"We are on the bubble with him academically," Brown says. "We are hoping that he will be able to pull it out. He is scheduled to take the ACT a couple more times."
On the field the linebacker has shown the ability to make lots of tackles.
"He started at defensive end as a sophomore, which was actually before I got here," Brown says. "We evaluated the tapes and he was just making plays all over the field. I got with my staff and said, ‘Look, let's put him in the middle linebacker spot because the kid can cover so much ground and we will see what he can do.' That first year, I think he averaged over 20 tackles per game.
"He had a similar performance this year," Brown points out. "It was a situation where we were hit hard being short on linemen. A lot of teams would change their blocking schemes and get people out on Carlton. I don't know if he had as many tackles this season, but he was definitely our leading tackler again although we didn't have the linemen in front of him to keep people off him like we had the previous year.
"He can run, jump, do it all," the coach adds. "He can punt. He is just an athlete."