Regarding the Jets running game, expect Chris Ivory and Stevan Ridley to share the bulk of the load. One of those two might get 20 to 30 carries more than the other guy, but it won't be a huge gap, provided both backs stay healthy all season.
With Chris Johnson out of the way, it looked like Ivory might be one of the more attractive middle round sleepers at his position, but the team’s decision to sign Stevan Ridley has thrown his status up in the air. He’s a career 4.7 YPC runner, and has averaged 4.4 YPC in two seasons with the Jets. It would have made more sense if the Jets had paired Ivory with a speed back/receiving threat like C.J. Spiller, but the arrival of Ridley is a concern. If the two players do indeed split carries, neither will carry much reliable fantasy value.