"I got hurt early on in the season and I wasn't able to finish the season out,"Johnson said. "Anytime you get a shoulder injury or a leg injury you want to make sure you let everything heal properly.
"I tried to do that, but as a football player you get anxious because you want to play, especially as the season is winding down."
Johnson's rehab is going according to plan.
"My doctor is impressed with how quickly I've healed from this and I'm getting close to being at full strength," he said.
In the meantime, Johnson was able to get down to Arizona's Junior Day.
"I want to look at as many schools as possible and this was a great one to get to because I could learn something from good coaches and good coaches at an in-state school," Johnson said.
Arizona's coaching staff made sure Johnson knew plenty about its last success with an in-state running back.
"I met with Coach Calvin Magee and he talked with all of us about they used Ka'Deem Carey," Johnson said. "You see that he's an in-state guy and he went on to do just amazing things. They used him in every way possible and I think that is something that I can see myself doing."
Johnson is in no hurry to pledge to a school. "First, I just want to get completely healthy because I think I can really show everyone how good I can be," he said.
"I'm getting some interest, but I don't have any firm dates on other camps or visits. That is fine with me because I think at the end of the day I will impress some coaches."