Johnson underwent offseason knee surgery to repair a torn meniscus, and says it will take some time before he can join the team as a full participant.
" I think they're going to hold me out of OTA's and just continue to let me rehab until I get 100 percent," he said. "Just from talking with Dr. Andrews, (I'll) take it slow. I have time on my side and (will) just be ready for camp."
Despite not being ready for OTA's, Johnson says he's moving in the right direction.
"I'm feeling good right now, getting better and better every day," he said. "This week (I) started being able to do straight-ahead running. The knee is feeling good and it's getting better and close to 100 percent."
Johnson will join Chris Ivory in the backfield when he returns from rehab. Ivory rushed for 833 yards and three touchdowns on 182 attempts in 2013 for a Jets rushing offense that ranked sixth in yards per carry.
Johnson says he's looking forward to joining a talented backfield.
"It is a situation where I knew the situation coming in and we are just going to work together," Johnson said. "Everybody's goal is to put wins on the board. We're not really worried about the carries, who's going to play this down and that down. We've all just got one focus and that's winning."
Johnson acknowledged that he will likely get fewer carries than he has in the past, both due to rehab and a talented backfield playing with him.
He knows that may be what's best for the team, though, and after making the playoffs just once in six seasons with the Tennessee Titans—with five straight seasons that ended without a playoff game—Johnson says he's ready to do what it takes to help the team.
"I've been in the league for six years and I've only been to the playoffs once. That's something a guy of my caliber would look towards and that's winning and playing in late December and January and hopefully trying to make it to the big game."
"I think it's a situation where I think this team is right on the edge of winning and making the playoffs."
Even with limited carries likely to come, he says he's excited to go out and prove he's the same type of running back that rushed for 2,000 yards in 2009. Not to mention proving his old team wrong.
"Any time a player gets released from a team they've been with so long, he always wants to go out there and prove that team wrong for letting them go," he said. "That's the situation where it's something else to put a chip on your shoulder and help you work hard for it."
Luckily for Johnson, he will get the chance to prove his old team wrong in person, as the Jets travel to Tennessee in Week 15.
"Oh yeah, most definitely," he said. "I can't wait for that game."